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MC33092A

更新时间： 2024-11-10 04:59:19
品牌 Logo 应用领域
飞思卡尔 - FREESCALE 调节器光电二极管电机
页数 文件大小 规格书
12页 295K
描述
Alternator Voltage Regulator

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MC33092A 数据手册

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Freescale Semiconductor, Inc.  
Order this document by MC33092A/D  
The MC33092A is specifically designed for voltage regulation and Load  
Response Control (LRC) of diode rectified alternator charging systems, as  
commonly found in automotive applications. The MC33092A provides load  
response control of the alternator output current to eliminate engine speed  
hunting and vibration due to sudden electrical loads which cause abrupt  
torque loading of the engine at low RPM. Two load response rates are  
selectable using Pin 11. The timing of the response rates is dependent on  
the oscillator frequency.  
ALTERNATOR VOLTAGE  
REGULATOR  
SEMICONDUCTOR  
TECHNICAL DATA  
In maintaining system voltage, the MC33092A monitors and compares  
the system battery voltage to an externally programmed set point value and  
pulse width modulates an N–channel MOSFET transistor to control the  
average alternator field current.  
• Forced Load Response Control (LRC) with Heavy Load Transitions  
at Low RPM  
• Capable of Regulating Voltage to ± 0.1 V @ 25°C  
• Operating Frequency Selectable with One External Resistor  
• < 0.1 V Variation over Speed Range of 2000 to 10,000 RPM  
• < 0.4 V Variation over 10% to 95% of Maximum Alternator Output  
• Maintains Regulation with External Loads as Low as 1.0 A  
• Load Dump Protection of Lamp, Field Control Devices, and Loads  
• Duty Cycle Limit Protection  
20  
1
DW SUFFIX  
PLASTIC PACKAGE  
CASE 751D  
(SO–20L)  
• Provides High Side MOSFET Control of a Ground Referenced Field  
Winding  
• Controlled MOSFET and Flyback Diode Recovery Characteristics for  
Minimum RFI  
• < 2.0 mA Standby Current from Battery @ 25°C  
• < 3.0 mA Standby Current from Battery Over Temperature Range  
• Optional 2.5 or 10 sec. LRC Rate Control (Osc. Freq. = 280 kHz)  
• Undervoltage, Overvoltage and Phase Fault (Broken Belt) Detection  
PIN CONNECTIONS  
Filter Buffer  
Remote Sense  
Lamp Collector  
Lamp Base  
1
2
V
ref  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
Undervoltage  
Source  
Gate  
Simplified Block Diagram  
3
FB UV  
19  
V
20  
V
14  
1
V 3  
CC  
13  
V
8
ref  
CC  
ref  
4
1
NC  
5
Bandgap  
Reference  
Gnd  
Power  
Supply  
Gnd  
6
MC33092A  
17  
Bias  
Lost  
Sense  
Circuit  
Charge  
Pump  
Oscillator  
Adjust  
V
CC  
1
3
7
Gate  
V
ref  
V
CC  
Supply  
Regulation  
8
Undervoltage  
18  
2
Oscillator  
Phase  
Load Dump  
Overvoltage  
9
Signal  
Combiner  
and Switch  
Low  
Pass  
Filter  
Source  
Buff  
Sense  
(Remote)  
10  
Rate  
3
Power  
Up/Down  
Circuit  
12  
Lamp  
Coll.  
(Top View)  
X1  
Supply  
Reg  
(Local)  
Regulate  
Output  
Control  
Lamp  
Control  
Logic  
4
10  
Control  
Logic  
Lamp  
Base  
Counter  
Phase  
12  
8
ORDERING INFORMATION  
Operating  
5
DAC  
Up/Down  
Counter  
(2 )  
4
Counter  
Prescaler  
(2 )  
Divide By  
(1/12/48)  
Gnd  
8
4
(2 )  
4
7
Temperature Range  
Device  
Package  
Oscillator  
Osc.  
Adjust  
MC33092ADW T = – 35° to +125°C  
SO–20L  
A
9
11  
Rate  
6
15  
Oscillator  
Gnd  
Motorola, Inc. 1997  
Rev 0  
For More Information On This Product,  
Go to: www.freescale.com  
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