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+

−

+

−

Oscillator

Reference

Voltage

R

S

170 k

Ω

UVLO

R

9

2

1

CT

10

16

7

8

REF

GND

PWM

COMP

PWM

Comparator

12 k

Ω

11

14

13

12

5

15

3

4

6

2DTC

2IN +

2IN −

2 FEEDBACK

1 FEEDBACK

SCP

1IN +

1IN −

1DTC

Error

Amplifier 2

Error

Amplifier 1

1OUT

2OUT

COMPONENT COUNT

Resistors

Capacitors

Transistors

JFETs

65

8

105

18

Absolute Maximum Ratings

(1)

TL1451A-EP

DUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS

SLVS614 – DECEMBER 2005

FUNCTIONAL BLOCK DIAGRAM

over operating free-air temperature range

MIN

MAX

UNIT

Supply voltage

51

V

Amplifier input voltage

20

V

Collector output voltage

51

V

Collector output current

21

mA

Continuous power total dissipation

See Dissipation Rating Table

Operating free-air temperature range

M suffix

–55

125

°C

Storage temperature range

–65

150

°C

Lead temperature

1,6 mm (1/16 in) from case for 10 s

260

°C

(1)

Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating

conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

2