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HS-4080ARH Preliminary Pin Descriptions

PIN

NUMBER

SYMBOL

DESCRIPTION

1

BHB

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

diode and positive side of bootstrap capacitor to this pin. Internal charge pump supplies 50

µA out of this pin to maintain

bootstrap supply. Internal circuitry clamps the bootstrap supply to approximately 15V.

2

HEN

High-side Enable input. Logic level input that when low overrides IN+/IN- (Pins 6 and 7) to put AHO and BHO drivers

(Pins 11 and 20) in low output state. When HEN is high AHO and BHO are controlled by IN+/IN- inputs. The pin can

no connection is required if high-side and low-side outputs are to be controlled by IN+/IN -inputs.

3

DIS

DISable input. Logic level input that when taken high sets all four outputs low. DIS high overrides all other inputs. When

DIS is taken low the outputs are controlled by the other inputs. The pin can be driven by signal levels of 0V to 18V (no

Chip negative supply, generally will be ground.

5

OUT

OUTput of the input control comparator. This rail to rail output signal can be used for feedback and hysteresis.

6

IN+

Noninverting input of control comparator. This pin can only be driven by signal levels of 0V to 5.5V. If IN+ is greater

than IN- (Pin 7) then ALO and BHO are low level outputs and BLO and AHO are high level outputs. If IN+ is less than

IN- then ALO and BHO are high level outputs and BLO and AHO are low level outputs. DIS (Pin 3) high level will

override IN+/IN- control for all outputs. HEN (Pin 2) low level will override IN+/IN- control of AHO and BHO. When

switching in four quadrant mode, dead time in a half bridge leg is controlled by HDEL and LDEL (Pins 8 and 9).

7

IN-

Inverting input of control comparator. This pin can only be driven by signal levels of 0V to 5.5V. See IN+ (Pin 6)

description.

8

HDEL

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

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

9

LDEL

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 boot-strap

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

µA out of this pin to maintain

bootstrap supply. Internal circuitry clamps the bootstrap supply to approximately 15V.

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

16

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.

HS-4080ARH