HIP4080

FN3178 Rev 11.00

Page 7 of 21

February, 2003

9

LDEL

Low-side turn-on DELay. Connect resistor from this pin to VSS to set timing current that defines the turn-on delay of

both low-side drivers. The high-side drivers turn-off with no adjustable delay, so the LDEL resistor guarantees no

shoot-through by delaying the turn-on of the low-side drivers. LDEL reference voltage is approximately 5.1V.

10

AHB

A High-side Bootstrap supply. External bootstrap diode and capacitor are required. Connect cathode of bootstrap

diode and positive side of bootstrap capacitor to this pin. Internal charge pump supplies 30

A out of this pin to

maintain bootstrap supply. Internal circuitry clamps the bootstrap supply to approximately 12.8V.

11

AHO

A High-side Output. Connect to gate of A High-side power MOSFET.

12

AHS

A High-side Source connection. Connect to source of A High-side power MOSFET. Connect negative side of

bootstrap capacitor to this pin.

13

ALO

A Low-side Output. Connect to gate of A Low-side power MOSFET.

14

ALS

A Low-side Source connection. Connect to source of A Low-side power MOSFET.

15

VCC

Positive supply to gate drivers. Must be same potential as VDD (Pin 16). Connect to anodes of two bootstrap diodes.

16

VDD

Positive supply to lower gate drivers. Must be same potential as VCC (Pin 15). De-couple this pin to VSS (Pin 4).

17

BLS

B Low-side Source connection. Connect to source of B Low-side power MOSFET.

18

BLO

B Low-side Output. Connect to gate of B Low-side power MOSFET.

19

BHS

B High-side Source connection. Connect to source of B High-side power MOSFET. Connect negative side of

bootstrap capacitor to this pin.

20

BHO

B High-side Output. Connect to gate of B High-side power MOSFET.

Pin Descriptions (Continued)

PIN

NUMBER

SYMBOL

DESCRIPTION

HIP4080

HIP4080