UTC-IC MC33092

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.
SOP-20
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
UTC
SOP-24
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
20-pin Package
F i l t er B u f f er
1
20
V r ef
R emot e S en s e
2
19
U n d er vol t ag e
L am p C ol l ec t or
3
18
S ou r c e
L amp B as e
4
17
G at e
GND
5
16
NC
GND
6
15
GND
O s c i l l at or A d j u s t
7
14
Vcc1
V r ef 0
8
13
Vcc3
O s c i l l at or
9
12
S u p p l y R eg u l at i on
P h as e
10
11
R at e
24-pin Package
UTC
F i l t er B u f f er
1
24
V r ef
R emot e S en s e
2
23
U n d er vol t ag e
L am p C ol l ec t or
3
22
S ou r c e
L amp B as e
4
21
G at e
GND
5
20
NC
GND
6
19
NC
O s c i l l at or A d j u s t
7
18
NC
V r ef 0
8
17
NC
O s c i l l at or
9
16
NC
P h as e
10
15
GND
R at e
11
14
Vcc1
S u p p l y R eg u l at i on
12
13
Vcc3
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QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
20-pin
Package
24-pin
Package
PIN NAME
DESCRIPTION
PIN No.
1
1
2
2
3
3
4
4
5
5
6, 15
7
6,15
7
8
8
9
9
10
10
11
11
12
12
13
14
15,6
13
14
15,6
16,17,18,
19,20
21
22
16
17
18
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 to give an accurate representation of the true battery
Sense
voltage. This input is also used to monitor overvoltage or load dump
conditions.
Lamp Collector This pin connects to the collector of the transistor (Q2) used to drive
the fault lamp. It is also used to sense a closed ignition switch (voltage
and
Power-Up/Down sense) which then turns power on to the IC.
The Lamp Base pin provides base current to the fault lamp drive
Lamp Base
transistor (Q2).
Grounded to provide a ground return for the fault lamp control logic
Ground
circuit.
Ground
IC ground reference pins.
Oscillator Adjust A resistor to ground on this pin adjusts the internal oscillator frequency.
This is a test point for the 1.1 V to 1.4 V reference voltage. It has a zero
Vref0 *
temperature coefficient. The reference is used internally for phase
signal and undervoltage detection.
Oscillator *
Test point for checking the operation of the internal oscillator.
The Phase input detects the existence of a magnetic field rotating
Phase
within the alternator.
The Rate pin is used to select a slow mode (floating) or fast mode
Rate
(ground) Load
Response Control recovery rate.
The voltage on the Supply Regulation pin is used as a representation
Supply
of the alternator output voltage. This input also used to monitor
Regulation
overvoltage or load dump conditions.
VCC3
Positive supply for the internal Charge Pump.
VCC1
Positive supply for the entire IC except for the Charge Pump.
Ground
Ground reference for the IC.
No connection.
N/C
FB
Controls the Gate of the MOSFET used to energize the field winding.
Field winding control MOSFET source reference.
If the voltage at this pin goes below 1.0 V, the fault lamp is guaranteed
23
Undervoltage to turn on. The IC will continue to function, but with limited
19
performance.
Test point for the 1.7 V to 2.3 V Bandgap reference voltage. This
voltage has a negative temperature coefficient of approximately –11
24**
Vref *
20
mV/°C.
NOTE: * Pins 8, 9 and 20(24**) are test points only.
** For 24-pin package.
UTC
Gate
Source
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
1
FB UV Vref Vref0
19 20
8
Vcc1
14
Vcc3
13
23** 24**
MC33092
Bandgap
Reference
Bias
Lost
Sense
Circuit
Sense
(Remote)
12
Supply
Reg
(Local)
Undervoltage
Low
Pass
Filter
Buff
X1
+
+
-
Phase
Source
Output
Control
Control
Logic
Counter
Prescaler
(24)
Osc.
Adjust
18 22**
Regulate
12
7
Gate
Load Dump
+
Overvoltage
+
+-
10
17 21**
Charge
Pump
+
-
Signal
Combiner
and Switch
2
Power
Supply
DAC
4
Counter
(28)
Power
Up/Down
Circuit
3
Lamp
Control
Logic
4
Lamp
Coll.
Lamp
Base
8
Divide By
(1/12/48)
Oscillator
9
Oscillator
5
Up/Down
Counter
(24)
11
Rate
Gnd
6 15
Gnd
Note: ** For 24-pin package
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Supply Voltage
Load Dump Transient Voltage (Note 1)
Negative Voltage (Note 2)
Power Dissipation (Ta = 125°C)
SOP-20
SOP-24
Operating Ambient Temperature
Operating Junction Temperature
Storage Temperature
NOTES: 1. 125 ms wide square wave pulse.
2. Maximum time = 2 minutes.
UTC
SYMBOL
RATINGS
UNIT
Vbat
+Vmax
–Vmin
24
40
-2.5
V
PD
867
1000
-40 ~ +125
+150
-45 ~ +150
Ta
Tj
Tstg
mW
°C
°C
°C
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QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified)
PARAMETER
DC CHARACTERISTICS
Regulation Voltage
(Determined by external resistor divider)
Regulation Voltage Temperature Coefficient
Suggested Battery Voltage Operating Range
Power Up/Down Threshold Voltage (Pin 3)
Standby Current,
Vbat = 12.8 V, Ignition off, Ta = 25°C
Vbat = 12.8 V, Ignition off, -40°C≦Ta≦125°C
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)
SYMBOL
MIN
MAX
UNIT
14.85
VReg
Tc
Vbat
Vpwr
TYP
-13
11.5
0.5
IQ1
V
-11
14.85
1.2
-9.0
16.5
2.0
mV/°C
V
V
1.3
2.0
3.0
mA
mA
IQ2
Vref0
1.1
1.25
1.4
V
Vref
TC
1.7
-13
2.3
-9.0
1.0
1.5
1.5
V
mV/°C
V
V
Hz
V
SLoss(th)
PTh
PRot
VUV
1.0
2.0
-11
0.6
1.25
36
1.25
VOV
1.09(Vref)
1.12(Vref)
1.16(Vref)
V
VLD
1.33(Vref)
1.4(Vref)
1.48(Vref)
V
1.0
SWITCHING CHARACTERISTICS
Fundamental Regulation Output Frequency,
[Pin 17 (21**)]
(Clock oscillator frequency divided by 4096)
Suggested Clock Oscillator Frequency Range, (Pin 9)
(Determined by external resistor, RT)
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),
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)
NOTE: ** For 24-pin package.
UTC
f
68
Hz
fosc
205
280
350
kHz
StartDC
OVDC
LRCFreq
27
3.5
247
29
4.7
273
31
5.5
309
%
LRCS
8.5
9.5
10.5
LRCF
34
38
42
LRCH
409
455
501
Hz
%/sec
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R121-006,A
UTC
R2
12
Oscillator
X1
RT Osc.
Adjust
7
12.5k
Phase
10
Supply
Reg
(Local)
Lost
Sense
Circuit
Counter
Prescaler
(24)
9 Oscillator
+
-
Low
Pass
Filter
R3
+
-
DAC 4
Counter
(28)
2.5 sec
10 sec
8
11 Rate
Divide By
(1/12/48)
Control
Logic
Regulate
Overvoltage
+
+
-
Vcc1
Up/Down
Counter
(24)
Output
Control
Gnd 6
15
Lamp
Control
Logic
Power
Up/Down
Circuit
Charge
Pump
13
1.0k
AlternateStator
Configuration
Power
Supply
14
250
+
- Undervoltage
Bias
Bandgap
Reference
Vref0
8
Load Dump
+
Vref
20
24**
12
23**
FB UV
1 19
FB
Buff
86k
MC33092
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
2.0k
Gnd
5
Lamp
Base
4
10
BSP52T1
(Q2)
Lamp
Coll.
3
Source
18
22**
Gate
17
21**
Vcc3
Sense
Ground
MB850
Stator
500
Lamp
Field
MTB36N06E
(Q1)
B+Supply
Phase
Battery
Lgnition
UTC MC33092 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD.
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QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
Standby Current vs. Temperature
ISB=Current from Vcc Supply
Vcc=12.8V (see Figure 1)
OFF)
Vc1=0.5V (lgnition
I(tot)
=1.5V
VPin2=VPin12
mA
VPin10=VPin11=VPin19(23**)=0V
0.7
0.6
0.5
0.4
0.3
Turn-On Voltage vs. Temperature
1.8
1.6
1.5
1.4
1.3
1.2
1.1
0.2
-55
1.0
-55
75 100 125
50
25
0
-25
Ambient Temperature, Ta (°C)
2.1
2.0
1.9
1.8
-55
-25
0
25
50
75
1.26
TC Reference Voltage, Vref0 (V)
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=VPin11=VPin19(23**)=0V
1.25
1.24
1.22
1.21
1.20
-55
100 125
Vcc=14.8V (see Figure 1)
70 Vc2=6.0V (S1 Closed)
VPin2=VPin10=VPin12=VPin19(23**)=1.5V
VPin11=0V
60
200 220 240 260 280 300 320 340 360
Frequency, f (kHz)
Load
Dump
Protection
2.5
Input Voltage, Vinput (V)
80
0
25
50
75
100 125
Input Voltage vs. Output Duty Cycle
3.0
R=Resistance from Pin 7 to Ground
f=Frequency at Pin 9
90
-25
Ambient Temperature, Ta (°C)
Oscillator Frequency vs. Timing Resistor
100
Vref0=Voltage at Pin 8
Vcc=12.8V (see Figure 1)
Vc2=6.0V (S1 Colsed)
VPin2=VPin12=1.5V
VPin10=VPin11=VPin19(23**)=0V
1.23
Ambient Temperature, Ta (°C)
110
50
75 100 125
0
-25
25
Ambient Temperature, Ta (°C)
0TC Reference Voltage vs. Temperature
Reference Voltage vs. Temperature
2.2
Resistance, RT (kΩ)
VON=Voltage at Pin 3
Vcc=12.8V (see Figure 1)
VPin2=VPin12=1.5V
VPin10=VPin11=VPin19(23**)=0V
1.7
Turn-on Voltage, Von (V)
Standby Current, ISB (mA)
0.8
2.0
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)
[email protected]>309Hz
VPin11=0V, VPin19(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.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R121-006,A
UTC MC33092 LINEAR INTEGRATED CIRCUIT
TYPICAL TEST CIRCUIT
Vcc
250
1.0k
FB UV Vref Vref0
20
8
1 19
23** 24**
MC33092
Bandgap
Reference
Bias
Lost
Sense
Circuit
+
-
Signal
Combiner
and Switch
2
Sense
(Remote)
12
Supply
Reg
(Local)
14
Low
Pass
Filter
+
Buff
+
-
10
+
-
Phase
Oscillator
Prescaler
(24)
9 Oscillator
Output
RT
DAC 4
Counter
(28)
Charge
Pump
Vcc3
21**
17
Gate
Undervoltage
22**
18
2.0k
Source
Power
Up/Down
Circuit
Regulate
Output
Control
Control
Logic
Counter
13
Load Dump
12
7
Power
Supply
Overvoltage
+
+-
X1
Vcc1
Lamp
Control
Logic
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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UNISONIC TECHNOLOGIES CO., LTD.
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QW-R121-006,A