HA16129AFPJ datasheet(4/23 Pages) RENESAS

4 / 23 page

HA16129AFPJ

Rev.1.00 Jun 15, 2005 page 4 of 22

Pin Function

Function

No.

Symbol

Function

P-RUN

Watchdog timer pulse input. The auto-reset function is controlled by the duty

cycle or frequency of this input pulse signal.

The resistor connected to this pin determines the current that flows in the Cf

pin capacitor. Use the resistor value from 100 k

Ω to 500 kΩ

WDT.

The current determined by the Rf pin charges the Cf capacitor and the

potential on this pin determines the watchdog timer frequency band.

The resistor connected to this pin determines the current that flows in the CR

pin capacitor. Use the resistor value from 100 k

Ω to 500 kΩ

tRH, tRL, tOFF

The current determined by the RR pin charges the capacitor CR and the

potential on this pin controls the

RES function (toff, tRH, and tRL).

tON

The resistor RT, which determines only the time tON for the RES function is

connected to this pin. This resistor determines the current that charges the

capacitor CR for the time tON. Use the resistor value from 100 k

Ω to 500 kΩ

tr, tRES

CRES

The current determined by the Rf pin charges the capacitor CRES, and the

RES delay times (Tr and TRES) are determined by the potential of this

capacitor.

–

GND

Ground

Vout

Voadj

Insert the resistor Roadj if fine adjustment of the regulator output voltage

Vout is required. Leave this pin open if Vout does not need to be changed.

Output

OUTE

Output for the OUTE function

Power

supply

VCC

Power supply

Short

detection

Connect the overcurrent detection resistor between the CS pin and the VCC

pin. If this function is not used, short this pin to VCC. Also, connect this pin to

the emitter of the external transistor.

CONT

Connect this pin to the base of the external transistor.

Vout

VOUT

Provides the regulator output voltage and the IC internal power supply.

Connect this pin to the collector of the external transistor.

NMIsns

This pin senses the

NMI detection voltage. If VCC is to be detected, connect

this pin to the VCC pin (however, note that an external resistor is required),

and if Vout is to be detected, connect this pin to the VOUT pin.

NMI

NMIadj

Insert a resistor if fine adjustment of the

NMI detection voltage is required.

Leave this pin open if fine adjustment is not required.

Output

NMI

NMI output

Output

RES

RES output

STBY

STBYadj

Insert a resistor if fine adjustment of the

STBY detection voltage is required.

Leave this pin open if fine adjustment is not required.

Output

STBY

STBY output

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