HA16107FP View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name

Description

View to exact match

HA16107FP

PWM Switching Regulator for High-performance Voltage Mode Control

Hitachi -> Renesas Electronics 

HA16107P/FP, HA16108P/FP

Undervoltage Lockout and PWM Output

The undervoltage lockout function turns off the PWM pulse output when the controller’s supply voltage

goes below a designated value. These ICs have two undervoltage lockout circuits. The UVL1 circuit

senses the supply voltage VIN. The UVL2 circuit senses the Vref voltage. A feature of these ICs is that

PWM output is turned on only when both voltages are above designated values. Otherwise, the IC operates

in standby mode.

The two built-in undervoltage lockout circuits make it possible to configure an extremely safe power

supply system. PWM output will shut down under a variety of abnormal conditions, such as if Vref is

shorted to ground while VIN is applied.

• UVL1 (VIN and Vref)

*1

IIN

9.5 V 16.2 V

0

10 V

Vref

*2

0

10 V

• UVL2 (Vref and PWM output)

20 V

30 V

6.45 V

20 V

30 V

34 V

VIN

Notes: 1. Breakdown voltage of

the internal Zener

diode (Vz = 34 V typ).

2. Hysteresis characteristic.

VIN

Vref

6.45 V

5V

4V

0

10 V

20 V

30 V

VIN

OUT

Operating region

0

10 V

20 V

30 V

PWM output shut-down region

• UVL1 and UVL2

VIN (UVL1)

Vref (UVL2)

L

H

H

L

L

H

PWM OUT

L

L

OUT

Standby mode



Note: Double circles indicate standby mode.

VIN

L

H

L

11

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