SA160DP 데이터 시트보기 (PDF) - Apex Microtechnology

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SA160DP

H-Bridge Motor Driver/Amplifiers

Apex Microtechnology 

SA160

EXTERNAL CONNECTIONS

1 2 3 4 5 6 7 8 9 10 11 12

*

*

CF

‡

‡

ANALOG DISABLE

NC

Vcc

GND

PWM

INPUT

ANALOG

INPUT

POWER

GND

ISENSE A *

A OUT

* ISENSE B

B OUT

‡ Required RC network. See paragraph

+Vs

on transient shutdown.

* Protection diodes are recommended for

applications where +Vs exceeds 50V.

12-pin Power SIP

PACKAGE

STYLE DP

TYPICAL APPLICATION

A wide variety of loads can be driven in either the voltage

mode or the current mode. The most common applications

use three external blocks: a low pass filter converting pulse

11

9

SA160

LOAD

width data to an analog output, a difference amplifier to

4

8

monitor voltage or current and an error amplifier. Filter in-

ductors must be suitable for square waves at the switching

3

12

2

frequency (laminated steel is generally not acceptable). Fil-

ter capacitors must be low ESR and rated for the expected

ripple current. A difference amplifier with gain of less than

one translates the differential output voltage to a single feedback voltage. Dashed line connections and a higher

gain difference amplifier would be used for current control. The error amplifier integrates the difference between the

input and feedback voltages to close the loop.

The SA160 also can be controlled through a microcontroller,

See figure to right.

GENERAL

Please read Application Note 30 on "PWM Basics". Refer to Application Note 1 "General Operating Considerations"

for helpful information regarding power supplies, heat sinking and mounting. Visit www.apexanalog.com for design

tools that help automate pwm filter design; heat sink selection; Apex Microtechnology’s complete Application Notes

library; Technical Seminar Workbook; and Evaluation Kits.

PWM OSCILLATOR – INTERNAL OR EXTERNAL

The SA160 contains an internal PWM oscillator whose frequency is determined by an external capacitor connected

between pin 1 and pin 2. Maximum frequency is 125 kHz. The user may also disregard the internal PWM oscillator

and supply the SA160 with an external TTL pulse generator up to 250kHz.

PIN DESCRIPTION

VCC - is the low voltage supply for powering internal logic and drivers for the lowside and highside MOSFETS. The

supplies for the highside drivers are derived from this voltage.

VS - is the higher voltage H-bridge supply. The MOSFETS obtain the output current from this supply pin. The voltage

on this pin is limited to +80V by the drive IC. The MOSFETS are rated at 100 volts.

6

SA160U

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