HIP0082, HIP0084

FN3643 Rev 4.00

Page 2 of 11

May 1998

Block Diagram

S

R

Q

DIAG.

REG.

REG.

SHIFT

STORE

WRITE/

TXD

CLK

CS

R/W

INx

RST

DELAY

FILTER/

FILTER

DELAY

ISC REF (PROG. 3, 4)

QO

VSG

1 OF 4

CHANNELS

SC

SG

OUTx

QOL

REF

OL

OL

RESET

POR

RST

OSC

IOLF

IOL(MAX)

VCC

VCC

CHARGE

PUMP

REF

REF

RST

OVER

TEMP.

VCC

+

-

+

-

+

-

POR

POR

(SHORT-TO-GND)

(SHORT CIRCUIT)

OPEN-

LOAD

CURRENT

SENSE

QO

OUTx

SG

OL

SG

OL

HIP0084 OUTPUT STAGE

DOL

SC

ROL

(NOTE 1)

VCC

VBATT

NOTE 2,

NOTE 2,

CASE 2

CASE 1

VBATT

VCC

VSS

(GND)

OSC

R/W

NOTES:

1. For Open-Load Detection, the HIP0082 has an internal series pullup resistor, ROL and diode, DOL connected from OUTx to VCC.

2. HIP0084 OL (Open-Load) Detection:



Case 1: For OL Detection, an external series resistor and diode pullup connected from OUTx to VCC is needed.

Case 2: If no failure distinction for OL or SG (Short-to-GND) is required, both faults may be detected (without distinction), with an external

pulldown resistor.



For either case, the pullup or pulldown resistors should be typically 10k

 or greater.