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Data Sheet No. PD60018-M

IR2121 & (PbF)
CURRENT LIMITING LOW SIDE DRIVER
Features

• Gate drive supply range from 12 to 18V
• Undervoltage lockout
• Current detection and limiting loop to limit driven

Product Summary
VOFFSET

5V max.

power transistor current

IO+/-

1A / 2A


shutdown time

VOUT

12 - 18V

VCSth

230 mV

ton/off (typ.)

150 & 150 ns

• Error lead indicates fault conditions and programs
• Output in phase with input
• 2.5V, 5V and 15V input logic compatible
• Also available LEAD-FREE

Description
The IR2121 is a high speed power MOSFET and
Package
IGBT driver with over-current limiting protection circuitry. Latch immune CMOS technology enables ruggedized monolithic construction. Logic inputs are
compatible with standard CMOS or LSTTL outputs,
down to 2.5V logic. The output driver features a
high pulse current buffer stage designed for minimum cross-conduction. The protection circuitry detects over-current in the driven power transistor and
limits the gate drive voltage. Cycle-by-cycle shut8-Lead PDIP
down is programmed by an external capacitor which
directly controls the time interval between detection of the over-current limiting condition and latched shutdown. The output can be used to drive an N-channel power MOSFET or IGBT in the low side configuration.

Typical Connection
TO
LOAD

VCC
IN

(Refer to Lead
Assignments for correct
pin configuration). This/

These diagram(s) show
electrical connections
only. Please refer to our
Application Notes and
DesignTips for proper
circuit board layout.

www.irf.com

VCC
IN

VCC
OUT

ERR

CS

COM

VS

1


IR2121 & (PbF)
Absolute Maximum Ratings
Absolute Maximum Ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to COM. The Thermal Resistance and Power Dissipation ratings are measured
under board mounted and still air conditions.

Parameter
Definition

Symbol
VCC

Fixed Supply Voltage

Value
Min.

Max.

Units

-0.3

25

VS

Gate Drive Return Voltage

VCC - 25

VCC + 0.3

VO

Output Voltage

VS - 0.3

VCC + 0.3

VIN

Logic Input Voltage

-0.3

VCC + 0.3

VERR

Error Signal Voltage

-0.3

VCC + 0.3

V

VCS

Current Sense Voltage

VS - 0.3

VCC + 0.3

PD

Package Power Dissipation @ TA ≤ +25°C



1.0

W

RthJA

°C/W

Thermal Resistance, Junction to Ambient



125

TJ

Junction Temperature



150

TS

Storage Temperature

-55

150

TL

Lead Temperature (Soldering, 10 seconds)



300

°C

Recommended Operating Conditions
The Input/Output logic timing diagram is shown in Figure 1. For proper operation the device should be used within the
recommended conditions. The VS offset rating is tested with all supplies biased at 15V differential.

Parameter
Definition

Symbol
VCC

Fixed Supply Voltage

Value
Min.

Max.

VS + 12

VS + 18

VS

Gate Drive Return Voltage

-5

5

VO

Output Voltage

VS

VCC

VIN

Logic Input Voltage

0

VCC

VERR

Error Signal Voltage

VCS
TA

2

0

VCC

Current Sense Signal Voltage

VS

VCC

Ambient Temperature

-40

125

Units

V

°C

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IR2121 & (PbF)
Dynamic Electrical Characteristics
VBIAS (VCC) = 15V, CL = 3300 pF and TA = 25°C unless otherwise specified. The dynamic electrical characteristics are
defined in Figures 2 through 5.

Symbol

Parameter
Definition

Value
Figure Min. Typ. Max. Units Test Conditions

ton
toff
tsd
tr
tf

Turn-On Propagation Delay
Turn-Off Propagation Delay
ERR Shutdown Propagation Delay
Turn-On Rise Time
Turn-Off Fall Time

7
8
9
10
11







150
200
1.7
43
26

200
250
2.2
60
35

tcs
terr

CS Shutdown Propagation Delay
CS to ERR Pull-Up Propagation Delay

12
13




0.7
9.0

1.2
12

ns

VIN = 0 & 5V

µs
ns
µs

CERR = 270 pF

Static Electrical Characteristics
VBIAS (VCC) = 15V and TA = 25°C unless otherwise specified. The VIN, VTH and IIN parameters are referenced to COM.
The VO and IO parameters are referenced to VS .

Symbol
VIH
VIL
VCSTH+
VCSTHVOH
VOL
IQCC
IIN+
IINICS+
ICSVCCUV+

Parameter
Definition
Logic “1” Input Voltage
Logic “0” Input Voltage
CS Input Positive Going Threshold
CS Input Negative Going Threshold
High Level Output Voltage, VBIAS - VO
Low Level Output Voltage, VO
Quiescent VCC Supply Current
Logic “1” Input Bias Current
Logic “0” Input Bias Current
“High” CS Bias Current
“Low” CS Bias Current
VCC Supply Undervoltage Positive Going

Value
Figure Min. Typ. Max. Units Test Conditions
14
15
16
17
18
19
20
21
22
23
24
25

2.2

150
130







8.3



230
210


1.1
4.5

4.5

8.9


0.8
320
300
100
100
2.2
10
1.0
10
1.0
9.6

26

7.3

8.0

8.7

IERR

Threshold
VCC Supply Undervoltage Negative Going
Threshold
ERR Timing Charge Current

27

65

100

130

IERR+

ERR Pull-Up Current

28

8.0

15



IERRIO+

ERR Pull-Down Current
Output High Short Circuit Pulsed Current

29
30

16
1.0

30
1.6




IO-

Output Low Short Circuit Pulsed Current

31

2.0

3.3



VCCUV-

V

mV

mA

µA

V

µA

mA

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IO = 0A
IO = 0A
VIN = VCS = 0V or 5V
VIN = 5V
VIN = 0V
VCS = 3V or 5V
VCS = 0V

A

VIN = 5V, VCS = 3V
ERR < VERR+
VIN = 5V, VCS = 3V
ERR > VERR+
VIN = 0V
VO = 0V, VIN = 5V
PW ≤ 10 µs
VO = 15V, VIN = 0V
PW ≤ 10 µs

3


IR2121 & (PbF)
Functional Block Diagram
V

V CC

CC

UV
DETECT
BUFFER

IN

OUT

PRE
DRIVER
VS

1.8V
0.23V
-

ERROR
TIMING

CS

+
AMPLIFER

ERR
blanking filter

1.8V

COMPARATOR

COM

Lead Definitions
Lead
Symbol Description
VCC
IN
ERR
COM
OUT
VS
CS

Logic and gate drive supply
Logic input for gate driver output (OUT), in phase with OUT
Serves multiple functions; status reporting, linear mode timing and cycle by cycle logic
shutdown
Logic ground
Gate drive output
Gate drive supply return
Current sense input to current sense comparator

Lead Assignments

8 Lead PDIP

4

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IR2121 & (PbF)

IN

CS

ERR

OUT

Figure 1. Input/Output Timing Diagram

Figure 2. Switching Time Test Circuit

50%

50%

50%

IN
ton

toff

tr
90%

OUT

tf

90%

10%

CS
t cs

OUT

90%

10%

Figure 3. Switching Time Waveform Definitions

Figure 4. ERR Shutdown Waveform Definitions

50%

CS
50%

terr

CS
tcs

HO

50%
90%

1.8V

ERR
dt

dt = C ×
Figure 5. CS Shutdown Waveform Definitions

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dV
1.8V
= C×
IERR
100 uA

Figure 6. CS to ERR Waveform Definitions

5


500

500

400

400
Turn-On Time (ns)

Turn-On Delay Time (ns)

IR2121 & (PbF)

300

200
Max.

300
Max.

200

Typ.

Typ.

100

100

0

0
-50

-25

0

25

50

75

100

125

10

12

Figure 7A. Turn-On Time vs. Temperature

16

18

20

Figure 7B. Turn-On Time vs. Voltage

500

500

400

400
Turn-Off Time (ns)

Turn-Off Delay Time (ns)

14

VBIAS Supply Voltage (V)

Temperature (°C)

300

200

300
Max.

200
Typ.

Max.
Typ.

100

100

0

0
-50

-25

0

25

50

75

100

125

10

12

Temperature (°C)

Figure 8A. Turn-Off Time vs. Temperature

ERR to Output Shutdown Delay Time (µs)

ERR to Output Shutdown Delay Time (µs)

18

20

5.00

4.00

3.00
Max.
Typ.

1.00

0.00

4.00

3.00

2.00

1.00

Max.

Typ.

0.00
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 9A. ERR to Output Shutdown vs. Temperature

6

16

Figure 8B. Turn-Off Time vs. Voltage

5.00

2.00

14

VBIAS Supply Voltage (V)

10

12

14

16

18

20

VBIAS Supply Voltage (V)

Figure 9B. ERR to Output Shutdown vs. Voltage

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IR2121 & (PbF)
100

100

80

80

60

Turn-On Rise Time (ns)

Turn-On Rise Time (ns)

Max.

Max.

Typ.

40

20

60
Typ.

40

20

0

0
-50

-25

0

25

50

75

100

10

125

12

Figure 10A. Turn-On Rise Time vs. Temperature

16

18

20

Figure 10B. Turn-On Rise Time vs. Voltage

100

100

80

80
Turn-Off Fall Time (ns)

Turn-Off Fall Time (ns)

14

VBIAS Supply Voltage (V)

Temperature (°C)

60

40
Max.

60
Max.

40
Typ.

Typ.

20

20

0

0
-50

-25

0

25

50

75

100

125

10

12

Figure 11A. Turn-Off Fall Time vs. Temperature

18

20

2.00
CS to Output Shutdown Delay Time (µs)

CS to Output Shutdown Delay Time (µs)

16

Figure 11B. Turn-Off Fall Time vs. Voltage

2.00

1.60

1.20

14

VBIAS Supply Voltage (V)

Temperature (°C)

Max.

0.80
Typ.

0.40

1.60
Max.

1.20
Typ.

0.80

0.40

0.00

0.00
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 12A. CS to Output Shutdown vs. Temperature

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10

12

14

16

18

20

VBIAS Supply Voltage (V)

Figure 12B. CS to Output Shutdown vs. Voltage

7


IR2121 & (PbF)
20.0

CS to ERR Pull-Up Delay Time (µs)

CS to ERR Pull-Up Delay Time (µs)

20.0

16.0
Max.

12.0
Typ.

8.0

4.0

0.0

16.0

12.0

M ax.

Typ.

8.0

4.0

0.0
-50

-25

0

25

50

75

100

125

10

12

5.00

5.00

4.00

4.00

3.00
Min.

2.00

1.00

20

3.00
Min.

2.00

0.00
-50

-25

0

25

50

75

100

125

10

12

14

16

18

20

VCC Logic Supply Voltage (V)

Temperature (°C)

Figure 14A. Logic “1” Input Threshold vs. Temperature

Figure 14B. Logic “1” Input Threshold vs. Voltage

5.00

5.00

4.00

4.00
Logic "0" Input Threshold (V)

Logic "0" Input Threshold (V)

18

1.00

0.00

3.00

2.00

3.00

2.00

1.00

Max.

0.00

Max.

0.00
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 15A. Logic “0” Input Threshold vs. Temperature

8

16

Figure 13B. CS to ERR Pull-Up vs. Voltage

Logic "1" Input Threshold (V)

Logic "1" Input Threshold (V)

Figure 13A. CS to ERR Pull-Up vs. Temperature

1.00

14

VBIAS Supply Voltage (V)

Temperature (°C)

10

12

14

16

18

20

VCC Logic Supply Voltage (V)

Figure 15B. Logic “0” Input Threshold vs. Voltage

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IR2121 & (PbF)
500

CS Input Positive Going Threshold (mV)

CS Input Positive Going Threshold (mV)

500

400
Max.

300
Typ.

200
Min.

100

0

400
Max.

300
Typ.

200
Min.

100

0
-50

-25

0

25

50

75

100

125

10

12

Figure 16A. CS Input Threshold (+) vs. Temperature

18

20

500
CS Input Negative Going Threshold (mV)

CS Input Negative Going Threshold (mV)

16

Figure 16B. CS Input Threshold (+) vs. Voltage

500

400

300
Max.

Typ.

200

Min.

100

0

400

300
Max.

Typ.

200

Min.

100

0
-50

-25

0

25

50

75

100

125

10

12

14

16

18

20

VBS Floating Supply Voltage (V)

Temperature (°C)

Figure 17A. CS Input Threshold (-) vs. Temperature

Figure 17B. CS Input Threshold (-) vs. Voltage

1.00

1.00

0.80

0.80
High Level Output Voltage (V)

High Level Output Voltage (V)

14

VBS Floating Supply Voltage (V)

Temperature (°C)

0.60

0.40

0.20

0.60

0.40

0.20
Max.

Max.

0.00

0.00
-50

-25

0

25

50

75

100

Temperature (°C)

Figure 18A. High Level Output vs. Temperature

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125

10

12

14

16

18

20

VBS Floating Supply Voltage (V)

Figure 18B. High Level Output vs. Voltage

9


1.00

1.00

0.80

0.80
Low Level Output Voltage (V)

Low Level Output Voltage (V)

IR2121 & (PbF)

0.60

0.40

0.20

0.60

0.40

0.20
Max.

Max.

0.00

0.00
-50

-25

0

25

50

75

100

125

10

12

5.00

5.00

4.00

4.00

3.00

Max.

1.00

Typ.

18

20

3.00

2.00

Max.

Typ.

1.00

0.00

0.00
-50

-25

0

25

50

75

100

125

10

12

14

16

18

20

VCC Supply Voltage (V)

Temperature (°C)

Figure 20A. VCC Supply Current vs. Temperature

Figure 20B. VCC Supply Current vs. Voltage

25

25

20

20

Logic "1" Input Bias Current (µA)

Logic "1" Input Bias Current (µA)

16

Figure 19B. Low Level Output vs. Voltage

VCC Supply Current (mA)

VCC Supply Current (mA)

Figure 19A. Low Level Output vs. Temperature

2.00

14

VBS Floating Supply Voltage (V)

Temperature (°C)

15

10
Max.

5

15

10

5

Max.

Typ.

Typ.

0

0
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 21A. Logic “1” Input Current vs. Temperature

10

10

12

14

16

18

20

VCC Logic Supply Voltage (V)

Figure 21B. Logic “1” Input Current vs. Voltage

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5.00

5.00

4.00

4.00

Logic "0" Input Bias Current (µA)

Logic "0" Input Bias Current (µA)

IR2121 & (PbF)

3.00

2.00

1.00

Max.

0.00

3.00

2.00

Max.

1.00

0.00
-50

-25

0

25

50

75

100

125

10

12

25.0

25.0

20.0

20.0

15.0

10.0
Max.
Typ.

20

15.0

10.0

Max.

Typ.

0.0
-50

-25

0

25

50

75

100

10

125

12

14

16

18

20

VBS Floating Supply Voltage (V)

Temperature (°C)

Figure 23A. “High” CS Bias Current vs. Temperature

Figure 23B. “High” CS Bias Current vs. Voltage

5.00

5.00

4.00

4.00
"Low" CS Bias Current (µA)

"Low" CS Bias Current (µA)

18

5.0

0.0

3.00

2.00

1.00

16

Figure 22B. Logic “0” Input Current vs. Voltage

"High" CS Bias Current (µA)

"High" CS Bias Current (µA)

Figure 22A. Logic “0” Input Current vs. Temperature

5.0

14

VCC Logic Supply Voltage (V)

Temperature (°C)

Max.

3.00

2.00

1.00

Max.

0.00

0.00
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 24A. “Low” CS Bias Current vs. Temperature

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10

12

14

16

18

20

VBS Floating Supply Voltage (V)

Figure 24B. “Low” CS Bias Current vs. Voltage

11


IR2121 & (PbF)
11.0

11.0

10.0
VCC Undervoltage Lockout - (V)

VCC Undervoltage Lockout + (V)

10.0
Max.

Typ.

9.0

Min.

8.0

9.0

Max.

Typ.

8.0

Min.

7.0

7.0

6.0

6.0
-50

-25

0

25

50

75

100

125

-50

-25

0

Temperature (°C)

250

250

200

200

150
Max.

Typ.

Min.

50

150

100

125

Max.

Typ.

Min.

50

0
-50

-25

0

25

50

75

100

125

10

12

Figure 27A. ERR Timing Charge Current vs. Temperature

16

18

20

Figure 27B. ERR Timing Charge Current vs. Voltage

25.0

25.0

20.0
ERR Pull-Up Current (mA)

20.0
Typ.

15.0

10.0

14

VCC Logic Supply Voltage (V)

Temperature (°C)

ERR Pull-Up Current (mA)

75

100

0

Min.

15.0
Typ.

10.0
Min.

5.0

5.0

0.0

0.0
-50

-25

0

25

50

75

100

Temperature (°C)

Figure 28A. ERR Pull-Up Current vs. Temperature

12

50

Figure 26. VCC Undervoltage (-) vs. Temperature

ERR Timing Charge Current (µA)

ERR Timing Charge Current (µA)

Figure 25. VCC Undervoltage (+) vs. Temperature

100

25

Temperature (°C)

125

10

12

14

16

18

20

VCC Logic Supply Voltage (V)

Figure 28B. ERR Pull-Up Current vs. Voltage

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IR2121 & (PbF)
50

50

40
ERR Pull-Down Current (mA)

ERR Pull-Down Current (mA)

40
Typ.

30

Min.

20

30
Typ.

20
Max.

10

10

0

0
-50

-25

0

25

50

75

100

10

125

12

Temperature (°C)

16

18

20

Figure 29B. ERR Pull-Down Current vs. Voltage

Figure 29A. ERR Pull-Down Current vs.Temperature

2.50

2.50

2.00

2.00

Typ.

Output Source Current (A)

Output Source Current (A)

14

VCC Logic Supply Voltage (V)

1.50
Min.

1.00

1.50

1.00

Typ.

Min.

0.50

0.50

0.00

0.00
-50

-25

0

25

50

75

100

125

10

12

Figure 30A. Output Source Current vs.Temperature

18

20

5.00

4.00

Typ.

Output Sink Current (A)

Output Sink Current (A)

16

Figure 30B. Output Source Current vs. Voltage

5.00

4.00

14

VBS Floating Supply Voltage (V)

Temperature (°C)

3.00
Min.

2.00

3.00
Typ.

2.00
Min.

1.00

1.00

0.00

0.00
-50

-25

0

25

50

75

100

125

Temperature (°C)

Figure 31A. Output Sink Current vs.Temperature

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10

12

14

16

18

20

VBS Floating Supply Voltage (V)

Figure 31B. Output Sink Current vs. Voltage

13


300

300

250

250
Max .

200

Turn-Off Delay Time (ns)

Turn-On Delay Time (ns)

IR2121 & (PbF)

150
100
50

200
150
100
Typ.

50
0

0
0

2

4

6

8

0

10 12 14 16 18 20

2

4

6

Input Voltage (V)

8

10 12 14 16 18 20

Input Voltage (V)

Figure 32A. Turn-On Time vs. Input Voltage

Figure 32B. Turn-Off Time vs. Input Voltage

0.00

VS Offset Supply Voltage (V)

-3.00
Typ.

-6.00

-9.00

-12.00

-15.00
10

12

14

16

18

20

VBS Floating Supply Voltage (V)

Figure 33. Maximum VS Negative Offset vs. Supply
Voltage

14

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IR2121 & (PbF)
Case outline

8-Lead PDIP

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01-6014
01-3003 01 (MS-001AB)

15


IR2121 & (PbF)

LEADFREE PART MARKING INFORMATION
Part number

IRxxxxxx

Date code

YWW?

Pin 1
Identifier
?
P

MARKING CODE
Lead Free Released
Non-Lead Free
Released

IR logo

?XXXX
Lot Code
(Prod mode - 4 digit SPN code)

Assembly site code
Per SCOP 200-002

ORDER INFORMATION
Basic Part (Non-Lead Free)
8-Lead PDIP IR2121 order IR2121

Leadfree Part
8-Lead PDIP IR2121 order IR2121PbF

IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105
This product has been qualified per industrial level
Data and specifications subject to change without notice. 9/13/2004

16

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