Datasheet

UNISONIC TECHNOLOGIES CO., LTD
UL9480
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LINEAR INTEGRATED CIRCUIT
A VOLTAGE REGULATOR FOR
CAR ALTERNATOR

DESCRIPTION
The UTC UL9480 is a specially designed voltage regulator for
car alternator. The regulator voltage is precise with “single function”
self-oscillation. These devices have a maximum output current of
5.5 A. The chip is integrated both the control section and the out
power stage. So the devices require no external components,
reducing the cost of the system and increasing reliability.

FEATURES
* No external components
* Precise regulated voltage
* High output current
* Very low start voltage
* Precise temperature coefficient
* Short circuit protection
* Output current limit
* Reverse battery protection
* +80V Load dump protection
* Low energy spike protection
* Over temperature protection

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UL9480L-TA3-T
UL9480G-TA3-T
Note: Pin Assignment: VS: VS
G: Ground O: Output

Package
TO-220
Pin Assignment
1
2
3
VS
G
O
Packing
Tube
MARKING
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UL9480
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LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN NO.
1
2
3
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PIN NAME
VS
OUTPUT
GND
DESCRIPTION
Voltage supply
Output
Ground
BLOCK DIAGRAM
VS
1
Load Dump
Protection
Curr.Limit &
Thermal
Compensat.
RS
Voltage
Reference
Over
Temperature
Pretection
Input
Divider
Input
Comparator
2 OUTPUT
Driver
3
GND
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Transient Overvoltage : Load Dump : 5ms ≤Trise
≤10ms, τf Fall Time Constant ≤100ms,
80
V
VS
Rsource≥0.5Ω
Current into Low Energy Clamping Zener
ICLAMP
100
mA
(Trise=5µs; Tdecay≤2ms; duty cycle≤5%)
Maximum Output Current
IOUT
5.5
A
Junction Temperature Range
TJ
-55~+150
°C
Storage Temperature Range
TSTG
-55~+150
°C
Note: 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.

THERMAL RESISTANCES CHARACTERISTICS
PARAMETER
SYMBOL
θJC
Junction to Case

RATINGS
3
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (-40°C≤TJ≤125°C unless otherwise noted)
PARAMETER
Regulation Voltage
Temperature Coeff. of the
Regulation Voltage
Error on Nominal Temperature
Coeff.
Load Regulation
Control Circuit Minimum Start
up Voltage
Shutdown Voltage (Dump
Protection Threshold)
Output Saturation Voltage
Start Up Saturation Voltage
Quiescent Current
Supply Current
Field Pin Sink Current
SYMBOL
MIN
TYP MAX
14.75 15.05 15.35
14.10 14.40 14.70
13.10 13.40 13.70
UNIT
V
V
V
CT
-10
mV/°C
eCT
±30
%
mV
VR
TEST CONDITIONS
TJ=-40°C
TJ=25°C
TJ=125°C
VR
0.1In<Ialt <0.9In (Note 1)
250
VSU
Measured at Supply Pin
2
Vsd
VSAT 1
VSAT 2
IQ
IS
Ifs
V
22
Ifield=4Ap
Ifield=200mA
Field Off
Ifield=4Ap
Field Off
Field Pin @ 16V
Low Energy Clamping Zener
V1_CLAMP
Iclamp=50mA
Voltage
Switching Frequency
FSW
0.1In<Ialt <0.9In
30
Note: Measured on an alternator with the following characteristics: In=<90A; Ialt/Ifield>=23.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3
1.2
0.7
20
50
V
2
1
V
V
mA
mA
5
mA
120
V
1000
Hz
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LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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