HA16108P Ver la hoja de datos (PDF) - Renesas Electronics

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HA16108P

PWM Switching Regulator for High-performance Voltage Mode Control

Renesas Electronics 

HA16107P/FP, HA16108P/FP

• Timing waveforms

16.2 V

VIN

9.5 V

6.45 V

5V

Vref

4V

0V

VCT, VST,

VE/O

4.2 V

3.8 V

2.2 V

0V

VOUT

(PWM pulse)

VIN

0V

Level determined by transformer

VIN

Vref

VST

VCT

CST discharge

Soft start

VE/O

Quick shutdown

Normal operation

(Time t)

Vref

9

Vref

from Vref

CST

ST

10

Zener

3.8 V diode

10 µA

from UVL2

(Effective for

quick shutdown)

+

+

− PWM comparator

VCT

E/O

15

7

Note: The soft-start time constant is determined by CST and the constant-current value (typically 10 µA).

Rev.4.00 Jun 15, 2005 page 8 of 39

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