L6227Q(2008) 데이터 시트보기 (PDF) - STMicroelectronics

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L6227Q
(Rev.:2008)

DMOS dual full bridge driver with PWM current controller

STMicroelectronics 

L6227Q

DMOS dual full bridge driver

with PWM current controller

Features

■ Operating supply voltage from 8 to 52 V

■ 2.8 A output peak current (1.4 A DC)

■ RDS(on) 0.73 Ω typ. value @ TJ = 25 °C

■ Operating frequency up to 100 kHz

■ Non dissipative overcurrent protection

■ Dual independent constant tOFF PWM current

controllers

■ Slow decay synchronous rectification

■ Cross conduction protection

■ Thermal shutdown

■ Under voltage lockout

■ Integrated fast free wheeling diodes

Applications

■ Bipolar stepper motor

■ Dual or quad DC motor

VFQFPN32 5 mm x 5 mm

Description

The L6227Q is a DMOS dual full bridge designed

for motor control applications, realized in

BCDmultipower technology, which combines

isolated DMOS power transistors with CMOS and

bipolar circuits on the same chip. The device also

includes two independent constant off time PWM

current controllers that performs the chopping

regulation. Available in VQFPN32 5 mm x 5 mm

package, the L6227Q features a non-dissipative

overcurrent protection on the high side power

MOSFETs and thermal shutdown.

Figure 1. Block diagram

VBOOT

VCP

VBOOT

CHARGE

PUMP

OCDA

ENA

IN1A

IN2A

THERMAL

PROTECTION

VOLTAGE

REGULATOR

10V 5V

ENB

IN1B

IN2B

June 2008

OCDB

VBOOT

VBOOT

VSA

OVER

CURRENT

DETECTION

10V

GATE

LOGIC

ONE SHOT

MONOSTABLE

OVER

CURRENT

DETECTION

GATE

LOGIC

Rev 2

10V

PWM

MASKING

TIME

+

SENSE

-

COMPARATOR

BRIDGE A

BRIDGE B

D99IN1085A

OUT1A

OUT2A

SENSEA

VREFA

RCA

VSB

OUT1B

OUT2B

SENSEB

VREFB

RCB

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