L9352B four channel valve driver

The L9352B is designed to drive inductive loads in low side configurations like hydraulic valves used in ABS/ESC systems.

Integrated active Zener diodes clamp (for channel1 and 2) or free wheeling diodes (for channel 3 and 4) allow the recirculation of the inductive loads.

All four channels are monitored with a status output. All wiring to the loads and supply pins of the device are controlled. The device is selfprotected against short circuit at the outputs and overtemperature. For each channel, one independent push-pull status output is used for a parallel diagnostic function.

Channel 3 and 4 work as current controlled channels. The target value of the current is given by the duty cycle (DC) of the 2 kHz PWM input signal.

The output current is controlled through the output PWM of the power stage. The regulator limits of 10% or 90% are detected and monitored with the status signal. The current is measured during the recirculation phase of the load.

Using an external clock frequency of 250 kHz, the PWM output frequancy is 3.9 kHz.

A digital PI (proportional and integrating) regulator is performed in order to internally control the target current basing on the load current measurements.

技术特性

Four low-side output driver with protection diagnostics.
- 2 channels designed as conventional switch (rON = 0.2 Ω typ.) with integrated 60 V Zener diodes clamp.
- 2 current controlled channels (rON = 0.2 Ω typ.) with current range from 0 mA to 2.25 A typ. with integrated recirculation diodes.
Output slope control
Short circuit protection
Selective overtemperature shutdown
Open load and over load current detection
Ground and supply loss detection
External clock control
Recirculation path control
Regulator drift detection
Regulator error control
Electrostatic discharge (ESD) protection

功能框图

L9352B 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
L9352B-LF	Preview	5.293	1000	PowerSO 36	Tube		L9352B-LF
L9352B-TR-LF	Active	5.293	1000	PowerSO 36	Tape And Reel		L9352B-TR-LF

DATASHEET

描述	版本	大小
DS3482 : Intelligent quad (2 x 5A/2 x 2.5A) low-side switch	6	322KB

DATA BRIEF

描述	版本	大小
DB0620: Four channel valve driver	1	133KB

APPLICATION NOTES

描述	版本	大小
AN2791: L9352B coil driver for ABS/ESP applications: current regulated channel analysis	1	500KB

USER MANUALS

描述	版本	大小
UM0546: PTB801DB evaluation board for ABS valve drivers system	1	318KB