HV9901_08 查看數據表（PDF） - Supertex Inc

零件编号

产品描述 (功能)

生产厂家

HV9901_08

Universal Relay Driver

Supertex Inc 

HV9901

Application Information (cont.)

R HDa

R HDb

V IN

VDD

C DD

VREF

C REF

H/D

C HD

VIN

Int

Reg

HV9901

C IN

SYNC

GT

V REF

PWM

CS

RT

Q SW

R SENSE

R OSC

2.0–5.5V

VCC

Aux

POL

@ 1mA

Reg

R FBa

ENO

FB

ENI

R FBb

Figure 2

Pin Description

Pin # Name Description

1

VIN Input supply.

2

-

Pin not present

3

-

Pin not present

4

GT Gate driver output for driving the external switching MOSFET.

5

CS Current sense input.

6

COM Common. Connect to circuit ground.

7

SYNC

Open-drain input/output for synchronizing the internal PWM oscillator to other HV9901s or to an

external clock.

8

RT A resistor from this pin to ground sets the PWM switching frequency.

9

POL Input that determines the polarity of the ENI input. See the truth table.

10

ENO Enable out. It is the logical inversion of the ENI signal.

11

ENI Enabled input. Whether ENI is active low or active high is determined by the POL input.

12

VCC

Output of the internal auxiliary regulator. Output voltage is determined by the resistive divider con-

nected to the FB pin.

13

FB Feedback input for the auxiliary regulator.

14

H/D

HOLD/DELAY input. An RC network connected to this pin controls the pull-in time and the holding

current. See the equations on page 4.

15 VREF Internal reference voltage. Bypass locally with a 10nF capacitor.

16

VDD Output of the internal regulator. Bypass locally with a 10nF capacitor.

● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com

5

Share Link: