HS9-4080ARH/PROTO Просмотр технического описания (PDF) - Intersil

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HS9-4080ARH/PROTO

Radiation Hardened Full Bridge N-Channel FET Driver

Intersil 

HS-4080ARH

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 50µA 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

be driven by signal levels of 0V to 18V (no greater than VDD). An internal 100µA pull-up to VDD will hold HEN high, so

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

greater than VDD). An internal 100µA pull-up to VDD will hold DIS high if this pin is not driven.

4

VSS

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

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 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 boot-strap

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

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.

2

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