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PDF MC33092 Data sheet ( Hoja de datos )

Número de pieza MC33092
Descripción LINEAR INTEGRATED CIRCUIT
Fabricantes Unisonic Technologies　
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UTC MC33092 LINEAR INTEGRATED CIRCUIT
ALTERNATOR VOLTAGE
REGULATOR
DESCRIPTION
The MC33092 is specifically designed for voltage
regulation and Load Response Control (LRC) of diode
rectified alternator charging systems, as commonly
found in automotive applications.
In maintaining system voltage, the MC33092
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.
FEATURE
*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
*Provides High Side MOSFET Control of a Ground
Referenced Field Winding
*Controlled MOSFET and Flyback Diode Recovery
Characteristics for Minimum RFI
*Optional 2.5 or 10 sec. LRC Rate Control (Osc. Freq.
= 280 kHz)
*Undervoltage, Overvoltage and Phase Fault (Broken
Belt) Detection
SOP-20
SOP-24
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R121-006,A

1 page




MC33092 pdf
UTC MC33092 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL MIN
TYP
DC CHARACTERISTICS
Regulation Voltage
(Determined by external resistor divider)
VReg
14.85
Regulation Voltage Temperature Coefficient
Tc -13 -11
Suggested Battery Voltage Operating Range
Vbat 11.5 14.85
Power Up/Down Threshold Voltage (Pin 3)
Vpwr
0.5
1.2
Standby Current,
Vbat = 12.8 V, Ignition off, Ta = 25°C
Vbat = 12.8 V, Ignition off, -40°C≦Ta≦125°C
IQ1
IQ2
1.3
Zero Temperature Coefficient Reference Voltage,
(Pin 8)
Vref0
1.1
1.25
Band Gap Reference Voltage [Pin 20 (24**)]
Vref 1.7
2.0
Band Gap Reference Temperature Coefficient
TC -13 -11
Sense Loss Threshold (Pin 2)
SLoss(th)
0.6
Phase Detection Threshold Voltage (Pin 10)
PTh 1.0 1.25
Phase Rotation Detection Frequency (Pin 10)
PRot
36
Undervoltage Threshold [Pin 19 (23**)]
VUV 1.0 1.25
Overvoltage Threshold
(Pin 2, or Pin 12 if Pin 2 is not used)
VOV 1.09(Vref) 1.12(Vref)
Load Dump Threshold
(Pin 2, or Pin 12 if Pin 2 is not used)
VLD 1.33(Vref) 1.4(Vref)
SWITCHING CHARACTERISTICS
Fundamental Regulation Output Frequency,
[Pin 17 (21**)]
f 68
(Clock oscillator frequency divided by 4096)
Suggested Clock Oscillator Frequency Range, (Pin 9)
(Determined by external resistor, RT)
fosc
205
280
Duty Cycle [Pin 17 (21**)]
At Start–up
During Overvoltage Condition
Low/High RPM Transition Frequency (Pin 10)
LRC Duty Cycle Increase Rate
Low RPM Mode (LRCFreq < 247 Hz),
StartDC
OVDC
LRCFreq
LRCS
27
3.5
247
8.5
29
4.7
273
9.5
Pin 11 = Open (Slow Rat)
Low RPM Mode (LRCFreq < 247 Hz),
Pin 11 = Grounded (Fast Rate)
LRCF
34
38
High RPM Mode (LRCFreq > 309 Hz),
Pin 11 = Don’t Care (LRC Mode is disabled)
LRCH
409
455
NOTE: ** For 24-pin package.
MAX
-9.0
16.5
2.0
2.0
3.0
1.4
2.3
-9.0
1.0
1.5
1.5
1.16(Vref)
1.48(Vref)
350
31
5.5
309
10.5
42
501
UNIT
V
mV/°C
V
V
mA
mA
V
V
mV/°C
V
V
Hz
V
V
V
Hz
kHz
%
Hz
%/sec
UTC
UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R121-006,A

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