Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UAC3092
LINEAR INTEGRATED CIRCUIT
ALTERNATOR VOLTAGE
REGULATOR
DESCRIPTION
SOP-20
The UAC3092 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 UAC3092 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.
SOP-24
FEATURE
*Forced Load Response Control (LRC) with Heavy Load Transitions
at Low RPM
*Capable of Regulating Voltage to ±0.1 V @ 25℃
*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
*Pb-free plating product number: UAC3092L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
UAC3092-S20-R
UAC3092L-S20-R
UAC3092-S20-T
UAC3092L-S20-T
UAC3092-S24-R
UAC3092L-S24-R
UAC3092-S24-T
UAC3092L-S24-T
Package
Packing
SOP-20
SOP-20
SOP-24
SOP-24
Tape Reel
Tube
Tape Reel
Tube
UAC3092L-S20-R
(1)Packing Type
(1) R: Tape Reel, T: Tube
(2)Package Type
(2) S20: SOP-20, S24: SOP-24
(3)Lead Plating
(3) L: Lead Free Plating, Blank: Pb/Sn
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QW-R121-003,B
UAC3092
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATIONS
20-pin Package
F i l ter Buffer
1
20
VR E F
Remote Sens e
2
19
Under v ol tage
Lamp Col l ec tor
3
18
Sour c e
Lamp Bas e
4
17
G ate
G ND
5
16
NC
G ND
O s c i l l ator Adj us t
6
15
G ND
7
14
Vc c 1
VR E F 0
8
13
Vc c 3
O s c i l l ator
9
12
Suppl y Regul ati on
Phas e
10
11
Rate
24-pin Package
F i l ter Buffer
1
24
V RE F
Remote Sens e
2
23
Under v ol tage
Lamp Col l ec tor
3
22
Sour c e
Lamp Bas e
4
21
G ate
G ND
5
20
NC
G ND
O s c i l l ator Adj us t
6
19
NC
7
18
NC
VR E F 0
8
17
NC
O s c i l l ator
9
16
NC
Phas e
10
15
G ND
Rate
11
14
Vc c 1
Suppl y Regul ati on
12
13
Vc c 3
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QW-R101-017,B
UAC3092
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
20-pin
24-pin
Package Package
PIN No.
1
2
3
4
5
6, 15
7
8
9
10
11
12
13
14
15,6
16
17
18
19
20
PIN NAME
DESCRIPTION
This pin provides a filtered result of the Sense input (if the Sense input is used)
or the Supply Regulation input (if the Sense input is not used).
The Sense input is a remote, low current battery voltage reference input used
2
Sense
to give an accurate representation of the true battery voltage. This input is also
used to monitor overvoltage or load dump conditions.
Lamp
This pin connects to the collector of the transistor (Q2) used to drive the fault
Collector and lamp. It is also used to sense a closed ignition switch (voltage sense) which
3
Power-Up/Do then turns power on to the IC.
wn
The Lamp Base pin provides base current to the fault lamp drive transistor
4
Lamp Base
(Q2).
5
Ground
Grounded to provide a ground return for the fault lamp control logic circuit.
6,15
Ground
IC ground reference pins.
Oscillator A resistor to ground on this pin adjusts the internal oscillator frequency.
7
Adjust
This is a test point for the 1.1V to 1.4V reference voltage. It has a zero
8
VREF0
temperature coefficient. The reference is used internally for phase signal and
undervoltage detection.
9
Oscillator Test point for checking the operation of the internal oscillator.
The Phase input detects the existence of a magnetic field rotating within the
10
Phase
alternator.
The Rate pin is used to select a slow mode (floating) or fast mode (ground)
11
Rate
Load
Response Control recovery rate.
The voltage on the Supply Regulation pin is used as a representation of the
Supply
alternator output voltage. This input also used to monitor overvoltage or load
12
Regulation
dump conditions.
13
VCC3
Positive supply for the internal Charge Pump.
14
VCC1
Positive supply for the entire IC except for the Charge Pump.
15,6
Ground
Ground reference for the IC.
No connection.
16,17,18,
N/C
19,20
21
Gate
Controls the Gate of the MOSFET used to energize the field winding.
22
Source
Field winding control MOSFET source reference.
If the voltage at this pin goes below 1.0 V, the fault lamp is guaranteed to turn
23
Undervoltage
on. The IC will continue to function, but with limited performance.
Test point for the 1.7 V to 2.3 V Band gap reference voltage. This voltage has
24
VREF
a negative temperature coefficient of approximately –11 mV/℃
1
FB
Note: Pins 8, 9, 20(20 Pin Package) and 24(24 Pin Package) are test points only.
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QW-R101-017,B
UAC3092
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
1
FB UV VREF VREF0
8
19 20
Vcc1
14
Vcc3
13
23 ** 24 **
UAC3092
Bandgap
Reference
Bias
Lost
Sense
Circuit
Sense
(Remote)
12
Low
Pass
Filter
Buff
+
+
-
Phase
7
Osc.
Adjust
Gate
18 22**
Load Dump
+
Power
Up/Down
Circuit
Overvoltage
+
+-
10
17 21**
Undervoltage
X1
Supply
Reg
(Local)
Charge
Pump
+
-
Signal
Combiner
and Switch
2
Power
Supply
Regulate
Control
Logic
Counter
Prescaler
(24)
Output
Control
12
DAC 4
Counter
(28)
Lamp
Coll.
4
Lamp
Base
8
Divide By
(1/12/48)
Oscillator
9
Oscillator
Lamp
Control
Logic
Sourc
e
3
11
Rate
5
Up/Down
Counter
(24)
Gnd
6 15
Gnd
Note: ** For 24-pin package
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UAC3092
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Supply Voltage
Load Dump Transient Voltage (Note 1)
Negative Voltage (Note 2)
SYMBOL
Vbat
+Vmax
–Vmin
SOP-20
SOP-24
Power Dissipation (Ta = 125℃)
PD
RATINGS
24
40
-2.5
867
1000
+150
-40 ~ +125
-45 ~ +150
UNIT
V
mW
mW
C
C
C
Operating Junction Temperature
TJ
Operating Ambient Temperature
TOPR
Storage Temperature
TSTG
Note: 1. 125 ms wide square wave pulse.
2. Maximum time = 2 minutes.
3. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
DC CHARACTERISTICS
Regulation Voltage
(Determined by external resistor
VReg
divider)
Regulation Voltage Temperature
Tc
Coefficient
Suggested Battery Voltage
Vbat
Operating Range
Power Up/Down Threshold
Vpwr
Voltage (Pin 3)
IQ1
Standby Current
IQ2
Zero Temperature Coefficient
Reference Voltage, (Pin 8)
Band Gap Reference Voltage
[Pin 20 (24**)]
Band Gap Reference
Temperature Coefficient
Sense Loss Threshold (Pin 2)
Phase Detection Threshold
Voltage (Pin 10)
Phase Rotation Detection
Frequency (Pin 10)
Undervoltage Threshold [Pin 19
(23**)]
Overvoltage Threshold
(Pin 2, or Pin 12 if Pin 2 is not
used)
Load Dump Threshold
(Pin 2, or Pin 12 if Pin 2 is not
used)
TEST CONDITIONS
MIN
TYP
MAX
14.85
UNIT
V
-13
-11
-9.0
mV/℃
11.5
14.85
16.5
V
0.5
1.2
2.0
V
1.3
2.0
mA
3.0
mA
Vbat = 12.8 V, Ignition off, Ta = 25℃
Vbat = 12.8 V, Ignition off,
-40℃≦Ta≦125℃
VREF0
1.1
1.25
1.4
V
VREF
1.7
2.0
2.3
V
TC
-13
-11
-9.0
mV/℃
0.6
1.0
V
1.25
1.5
V
SLoss(TH)
PTH
PPOT
36
Hz
VUV
1.0
1.25
1.5
V
VOV
1.09(VREF)
1.12(VREF)
1.16(VREF)
V
VLD
1.33(VREF)
1.4(VREF)
1.48(VREF)
V
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QW-R101-017,B
UAC3092
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
SYMBOL
SWITCHING CHARACTERISTICS
Fundamental Regulation Output
f
Frequency, [Pin 17 (21**)]
Suggested Clock Oscillator
fosc
Frequency Range, (Pin 9)
Duty Cycle [Pin 17 (21**)]
At Start–up
StartDC
During Overvoltage Condition
OVDC
Low/High RPM Transition
LRCFreq
Frequency (Pin 10)
LRCS
LRCF
LRC Duty Cycle Increase Rate
LRCH
Note:
TEST CONDITIONS
MIN
Clock oscillator frequency divided by
4096
Determined by external resistor, RT
Low RPM Mode (LRCFreq < 247 Hz),
Pin 11 = Open (Slow Rat)
Low RPM Mode (LRCFreq < 247 Hz),
Pin 11 = Grounded (Fast Rate)
High RPM Mode (LRCFreq > 309 Hz),
Pin 11 = Don’t Care (LRC Mode is
disabled)
TYP
MAX
68
UNIT
Hz
205
280
350
kHz
27
3.5
29
4.7
31
5.5
%
247
273
309
Hz
8.5
9.5
10.5
34
38
42
409
455
501
%/sec
** For 24-pin package.
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QW-R101-017,B
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R2
Oscillator
X1
RT Osc.
Adjust
7
12.5k
Phase
10
Supply
Reg
(Local)
12
Lost
Sense
Circuit
Counter
Prescaler
(24)
9 Oscillator
+
-
Low
Pass
Filter
+
-
DAC 4
Counter
(28)
2.5 sec
10 sec
8
11 Rate
Divide By
(1/12/48)
Control
Logic
Regulate
Overvoltage
+
+
-
Load Dump
+
Vcc1
Up/Down
Counter
4
(2 )
Output
Control
Gnd 6
15
Lamp
Control
Logic
Power
Up/Down
Circuit
Charge
Pump
13
1.0k
Alternate Stator
Configuration
Power
Supply
14
250
+
- Undervoltage
Bias
Bandgap
Reference
VREF VREF0
20
8
24 **
12
23**
FB UV
1 19
R3
FB
Buff
86k
UAC3092
Signal
Combiner
and Switch
Notes:R1=R2=3.0k to 5.0k
R3=10k to 15k
RT=50k to 100k
** For 24-pin package.
R1
Sense
2
45k
<Remote>
28k
28k
2.0k
20k
Gnd
5
Lamp
Base
10
BSP52T1
(Q2)
4
Lamp
Coll.
Sourc
e
3 2.0k
18
22**
Gate
17
21**
Vcc3
Ground
MB850
Stator
500
Lamp
Field
MTB36N06E
(Q1)
B+Supply
Phase
Sense
Battery
Lgnition
UAC3092
LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
QW-R101-017,B
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UAC3092
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Standby Current vs. Temperature
ISB =Current from Vcc Supply
Vcc=12.8V (see Figure 1)
(lgnition OFF)
Vc 1=0.5V I(tot)
VPin2=VPin12mA
=1.5V
VPin10 =VPin11 =VPin19(23**)=0V
0.7
0.6
0.5
0.4
Turn-On Voltage vs. Temperature
1.8
0.3
1.6
1.5
1.4
1.3
1.2
1.1
0.2
-55
1.0
-55
75 100 125
50
0
25
-25
Ambient Temperature, Ta (°C)
Reference Voltage, VREF (V)
VREF=Voltage at Pin 20(24**)
Vcc=12.8V (see Figure 1)
(lgnition OFF)
Vc1 =0.5V I(tot)
mA
=1.5V
VPin2 =VPin12
VPin10 =V Pin11 =VPin19(23**) =0V
2.1
2.0
1.9
-25
0
25
50
75
TC Reference Voltage, VREF0 (V)
1.26
1.8
-55
VREF0=Voltage at Pin 8
Vcc=12.8V (see Figure 1)
1.25 Vc2 =6.0V (S1 Colsed)
VPin2 =VPin12 =1.5V
1.24 VPin10 =V Pin11 =VPin19(23**)=0V
1.23
1.22
1.21
1.20
-55
100 125
Ambient Temperature, Ta (°C)
3.0
R=Resistance from Pin 7 to Ground
f=Frequency at Pin9
90
80
Vcc=14.8V (see Figure 1)
70 Vc2 =6.0V (S1 Closed)
VPin 2=VPin10=VPin 12=VPin 19(23**)=1.5 V
VPin11=0V
60
200 220 240 260 280 300 320 340 360
Frequency, f (kHz)
2.5
Input Voltage, VIN (V)
100
50
75 100 125
-25
0
25
Ambient Temperature, Ta (°C)
Input Voltage vs. Output Duty Cycle
Oscillator Frequency vs . Timing Resistor
Resistance, RT (kΩ)
50
75 100 125
-25
0
25
Ambient Temperature, Ta (°C)
0TC Reference Voltage vs. Temperature
Reference Voltage vs. Temperature
2.2
110
VON=Voltage at Pin 3
Vcc=12.8V (see Figure 1)
VPin2 =VPin12 =1.5V
VPin10 =V Pin11 =VPin19(23**) =0V
1.7
Turn-on Voltage, VON (V)
Standby Current, ISB (mA)
0.8
2.0
Load
Dump
Protection
Vin=Voltage at Pin 2 or 12
Duty Cycle taken at Pin 17(21**)
Vcc=14.8V (see Figure 1)
Vc2=6.0V (S1 Closed)
VPin 10=1.5V@>309Hz
VPin 11=0V, VPin 19(23**)=1.5V
1.96
1.95
1.94
1.93
0
10 20 30 40 50 60 70 80 90 100
Duty Cycle, DC (%)
Note: ** For 24-pin package.
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8 of 9
QW-R101-017,B
UAC3092
LINEAR INTEGRATED CIRCUIT
TYPICAL TEST CIRCUIT
Vcc
250
1.0k
FB UV VREF VREF0
8
1 19 20
23** 24**
UAC3092
Bandgap
Reference
Bias
Lost
Sense
Circuit
Sense
(Remote)
12
Supply
Reg
(Local)
+
-
Signal
Combiner
and Switch
2
14
Low
Pass
Filter
+
Buff
+
-
Phase
RT
Power
Up/Down
Circuit
Output
Control
Control
Logic
Counter
Prescaler
(24)
Oscillator
DAC 4
Counter
(28)
9 Oscillator
Output
21**
17
Gate
22**
18 2.0k
Load Dump
12
7
Charge
Pump
Vcc3
Undervoltage
Regulate
+
-
10
13
Power
Supply
Overvoltage
+
+-
X1
Vcc1
Lamp
Control
Logic
Sourc
e
3
Lamp 2.0k
Coll.
S1
vc1
vc2
4
Lamp
Base
8
Divide By
(1/12/48)
Rate
11
5
Up/Down
Counter
(24)
Gnd
6 15
Gnd
Note: ** For 24-pin package
Figure 1.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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QW-R101-017,B
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