TPIC46L01, TPIC46L02, TPIC46L03

6-CHANNEL SERIAL AND PARALLEL LOW-SIDE PRE-FET DRIVER

SLIS055A – NOVEMBER 1996 - REVISED SEPTEMBER 1997

4

POST OFFICE BOX 655303

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

I/O

DESCRIPTION

CS

10

I

Chip select. A high to low transition on the CS enables SDO, latches fault data into the serial interface, and

refreshes the fault flag. When CS is high, the fault registers can change fault status. On the falling edge of CS, fault

data is latched into the serial output register and transferred using SDO and SCLK. On a low to high transition of

CS, serial data is latched in to the output control register.

DRAIN0

DRAIN1

DRAIN2

DRAIN3

DRAIN4

DRAIN5

26

24

23

20

19

17

I

FET drain inputs. DRAIN0 through DRAIN5 are used for both open-load and short-circuit fault detection at the drain

of the external FETs. They are also used for inductive transient protection.

FLT

1

O

Fault flag. FLT is an open-drain output that provides a real-time fault flag for shorted-load/open-load/over-battery

voltage/under-battery voltage faults. The device can be ORed with FLT on other devices for interrupt handling. FLT

requires an external pullup resistor.

GATE0

GATE1

GATE2

GATE3

GATE4

GATE5

27

25

22

21

18

16

O

Gate drive output. GATE0 through GATE5 outputs are derived from the VBAT supply. Internal clamps prevent the

voltages on these nodes from exceeding the VGS rating on most FETs.

GND

15

I

Ground and substrate

IN0

IN1

IN2

IN3

IN4

IN5

4

5

6

7

8

9

I

Parallel gate driver inputs. IN0 through IN5 are real-time controls for the gate predrive circuitry. They are CMOS

compatible with hysteresis.

SCLK

13

I

Serial clock. SCLK clocks the shift register. Serial data is clocked into SDI and serial fault data is clocked out of

SDO on the falling edge of the serial clock.

SDI

12

I

Serial data input. Output control data is clocked into the serial register through SDI. A 1 on SDI commands a

particular gate output on and a 0 turns it off.

SDO

11

O

Serial data output. SDO is a 3-state output that transfers fault data to the controling device. It also passes serial

input data to the next stage for cascaded operation. SDO is taken to a high-impedance state when CS is in a high

state.

VBAT

28

I

Battery supply voltage input

VCC

14

I

Logic supply voltage

VCOMPEN

2

I

Fault reference voltage select. VCOMPEN selects the internally generated fault reference voltage (0) or an

external fault reference (1) to be used in the shorted- and open-load fault detection circuitry.

VCOMP

3

I

Fault reference voltage. VCOMP provides an external fault reference voltage for the shorted- and open-load fault

detection circuitry.