DataSheet8.cn


PDF ( 数据手册 , 数据表 ) L9347PD

零件编号 L9347PD
描述 INTELLIGENT QUAD 2X5A/2X2.5A LOW-SIDE SWITCH
制造商 STMicroelectronics
LOGO STMicroelectronics LOGO 


1 Page

No Preview Available !

L9347PD 数据手册, 描述, 功能
L9347
INTELLIGENT QUAD (2X5A/2X2.5A) LOW-SIDE SWITCH
s Quad low-side switch
s 2 x 5A designed as conventional switch
s 2 x 2.5A designed as switched current-regulator
s Low ON-resistance 2 x 0.2, 2 x 0.35(typ.)
s Power SO-36 - package with integrated
cooling area
s Integrated free-wheeling and clamping Z-diodes
s Output slope control
s Short circuit protection
s Selective overtemperature shutdown
s Open load detection
s Ground and supply loss detection
s External clock control
s Recirculation control
s Regulator drift detection
s Regulator error control
s Regulator resolution 5mA
s Status monitoring
s Status push-pull stages
s Electrostatic discharge (ESD) protection
Figure 1. Pin Connection
PowerSO-36
BARE DIE
ORDERING NUMBERS:
L9347PD
L9347DIE1
DESCRIPTION
The L9347 is an integrated quad low-side power
switch to drive inductive loads like valves used in
ABS systems. Two of the four channels are current
regulators with current range from 250mA to 2.25A
and an accuracy of 10%.
All channels are protected against fail functions.
They are monitored by a status output.
June 2002
99AT0060
GND
PGND3
PGND3
Q3
Q3
D3
D3
Q1
Q1
Q2
Q2
D4
D4
Q4
Q4
PGND4
PGND4
N.C.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36 CLK
35 ST3
34 IN1
33 IN3
32 ST1
31 PGND1
30 PGND1
29 VS
28 PGND2
27 PGND2
26 TEST
25 EN
24 ST2
23 IN4
22 IN2
21 ST4
20 VDD
19 VCC
1/21







L9347PD pdf, 数据表
L9347
1.0 Functional Description
1.1 Overview
The L9347 is designed to drive inductive loads (relays, electromagnetic valves) in low side configuration. Inte-
grated active Zener-clamp (for channel1 and 2) or free wheeling diodes (for channel 3 and 4) allow the recircu-
lation 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 self-protected against short circuit at the outputs and over-
temperature. For each channel one independent push-pull status output is used for a parallel diagnostic func-
tion.
Channel 3 and 4 work as current regulator. A PWM signal on the input defines the target output current. 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 recirculation phase of the load.
A test mode compares the differences between the two regulators. This “drift” test compares the output PWM
of the regulators. By this feature a drift of the load during lifetime can be detected.
1.2 Input Circuits
The INput, CLK, TEST and ENable inputs, are active high, consist of Schmidt triggers with hysteresis. All inputs
are connected to pull-down current sources.
1.3 Output Stages (not regulated) Channel 1 and 2
The two power outputs (5A) consist of DMOS-power transistors with open drain output. The output stages are
protected against short circuit. Via integrated Zener-clamp-diodes the overvoltage of the inductive loads due to
recirculation are clamped to typ. 52V for fast shut off of the valves. Parallel to the DMOS transistors there are
internal pull-down current sources. They are provided to assure an open load condition in the OFF-state. With
EN=low this current source is switched off, but the open load comparator is still active.
1.4 Current-Regulator-Stages Channel 3 and 4
The current-regulator channels are designed to drive inductive loads. The target value of the current is given by
the duty cycle (DC) of the 2kHz PWM input signal. The following figure shows the relation between the input
PWM and the output current and the specified accuracy.
Figure 3. Input PWM to output current range
2250
8/21
+-10%
800
+- 6%
400
±10%
250
10
INPUT PWM[%]
90







L9347PD equivalent, schematic
L9347
Figure 10. Pulsed Open Load Conditions (regulated and non-regulated channels)
VIN
VQ 0.33 x VS
IQ
VST
99AT0067
tlf
tD tlf
2.2 Regulated Channels (timing diagrams of diagnostic with 2kHz PWM input signal)
Figure 11. Normal Condition, Inductive Load
500 µs
VIN
tDREG
VQ
IQ 256µs
256 µs
Target Current
VST
99AT0068
16/21










页数 21 页
下载[ L9347PD.PDF 数据手册 ]


分享链接

Link :

推荐数据表

零件编号描述制造商
L9347PDINTELLIGENT QUAD 2X5A/2X2.5A LOW-SIDE SWITCHSTMicroelectronics
STMicroelectronics

零件编号描述制造商
STK15C88256-Kbit (32 K x 8) PowerStore nvSRAMCypress Semiconductor
Cypress Semiconductor
NJM4556DUAL HIGH CURRENT OPERATIONAL AMPLIFIERNew Japan Radio
New Japan Radio
EL1118-G5 PIN LONG CREEPAGE SOP PHOTOTRANSISTOR PHOTOCOUPLEREverlight
Everlight


DataSheet8.cn    |   2020   |  联系我们   |   搜索  |  Simemap