UNISONIC TECHNOLOGIES CO., LTD
UM601/A
Preliminary
LINEAR INTEGRATED CIRCUIT
VOLTAGE AND CURRENT
CONTROLLER
DESCRIPTION
The UTC
UM601/A
integrated circuit incorporates a high stability
series band gap voltage reference, two ORed operational amplifiers and
a current source.
This IC compares the DC voltage and the current level at the
output of a switching power supply to an internal reference. It provides a
feedback through an optocoupler to the PWM controller IC in the primary
side.
The controlled current generator can be used to modify the level of
current limitation by offsetting the information coming from the current
sensing resistor.
It can be used in voltage supervisors, every types of application
requiring a precision voltage regulation and current limitation, over
voltage protection, battery charger with a constant voltage and a limited
output current.
FEATURES
* 1.24V Series Voltage Reference with 10mA Output Current and 1% Precision (UM601A)
* Two Operational Amplifiers with ORed Output and 1MHz Gain Bandwidth Product
* Built-In Current Generator with Enable / Disable Function
* 4.5 ~ 32V Supply Voltage Range
ORDERING INFORMATION
Normal
UM601-S08-R
UM601-D08-T
UM601A-S08-R
UM601A-D08-T
Ordering Number
Lead Free
UM601L-S08-R
UM601L-D08-T
UM601AL-S08-R
UM601AL-D08-T
Halogen Free
UM601G-S08-R
UM601G-D08-T
UM601AG-S08-R
UM601AG-D08-T
Package
SOP-8
DIP-8
SOP-8
DIP-8
Packing
Tape Reel
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
1 of 5
QW-R105-028.B
UM601/A
PIN CONFIGURATION
Preliminary
LINEAR INTEGRATED CIRCUIT
V
REF
1
V
REF
8
V
CC
+
C
RREF
-
C
SEN
2
7
V
RIN
3
6
OUTPUT
GND
4
+
-
5
C
RIN
PIN DESCRIPTION
PIN
1.
2.
3.
4.
5.
6.
7.
8.
NAME
V
REF
C
SEN
C
RREF
GND
C
RIN
OUTPUT
V
RIN
V
CC
TYPE
OUTPUT
INPUT
INPUT
INPUT
INPUT
OUTPUT
INPUT
INPUT
FUNCTION
Voltage Reference Output 1.24V, 10mA max. Do not short circuit
Current source enable input. This current source can be used to offset the
voltage measurement on the sense resistor and therefore to modify the charge
current. The current source is enabled when the input volage on pin 2 is lower
than 0.8V
Current Limitation Reference Input
Ground
Current Limitation Loop Input, connected to the sense resistor
Output pin common to the voltage regulation and current limitation loops. This
output can drive the primary side (LED) of an optocoupler
Voltage Regulation Loop Input
Power Supply Input (4.5 ~ 32VDC)
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R105-028.B
UM601/A
BLOCK DIAGRAM
Preliminary
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
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QW-R105-028.B
UM601/A
Preliminary
LINEAR INTEGRATED CIRCUIT
UNIT
V
mA
mW
V
mA
°C
°C
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
DC Supply Voltage
V
CC
36
Output Current
I
OUT
20
Power Dissipation
P
D
200
Input Voltage
V
IN
-0.3 ~ V
CC
-1.5
Input Current
I
IN
±1
Junction Temperature
T
J
150
Storage Temperature
T
STG
-40 ~ +125
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.
OPERATING CONDITIONS
PARAMETER
Supply Voltage
Ambient Operating Temperature
SYMBOL
V
CC
T
OPR
SYMBOL
θ
JA
RATINGS
4.5 ~ 32
T
MIN
~ T
MAX
RATINGS
130 ~ 200
UNIT
V
°C
UNIT
°C/W
THERMAL DATA
PARAMETER
Junction to Ambient
PARAMETER
Total Supply Current
Input Voltage
Input Offset Voltage
Input Bias Current
Output Sink Current
Large Signal Voltage Gain
Supply Voltage Rejection Ratio
Common Mode Rejection Ratio
Gain Bandwidth Product
Output Leakage Current
VOLTAGE REFERENCE
Reference Voltage
Temperature Stability
Load Regulation
Line Regulation
CURRENT GENERATOR
Current Source
Temperature Stability
Line Regulation
Voltage at the enable pin to have
I
O
=1.4mA
Voltage at the enable pin to have
I
O
=0mA
Input Current on the Csen pin
Leakage Current
V
REF
K
VT
Reglo
Regli
I
O
K
CGT
CgliR
V
CSEN
V
CSDIS
I
CSEN
I
CSLEAK
I
OUT
=1mA, T
AMB
=25°C
T
MIN.
<T
AMB.
<T
MAX.
1mA <I
OUT
<10mA
5V<V
IN
<32V
UM601
UM601A
1.21 1.24 1.27
V
1.227 1.240 1.252
30
100
ppm/°C
5
15
mV
3.5
10
mV
1.4
mA
500
ppm/°C
0.003 0.030 mV
0.6
2
0.5
30
2
V
V
μA
μA
ELECTRICAL CHARACTERISTICS
(V
CC
=15V, T
A
=25°C, unless otherwise specified)
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
I
CC
V
CC
=15V
2
mA
V
I
0
V
V
CC
-1.5
T
A
=25°C
-5
1
5
mV
V
IO
T
MIN.
<T
AMB.
<T
MAX.
-7
7
mV
V
IN
=1.2V on pin 7 25°C
-700 -300
0
nA
I
IB
and V
IN
=0V on pin5 T
MIN.
<T
AMB.
<T
MAX.
-1000
0
nA
25°C
15
mA
I
SINK
V
OL
=2.5 V
8
mA
T
MIN.
<T
AMB.
<T
MAX.
A
VO
R
L
=2kΩ, T
MIN.
<T
AMB.
<T
MAX.
15
V/mV
SVR
T
MIN.
<T
AMB.
<T
MAX.
65
90
dB
CMR T
MIN.
<T
AMB.
<T
MAX.
80
dB
V
CC
=15V, F=100kHz, V
IN
=10mV,
1
MH
Z
GBP
R
L
=2kΩ, C
L
=100pF
T
A
=25°C
2
μA
I
OH
7
μA
T
MIN.
<T
AMB.
<T
MAX.
T
MIN.
<T
AMB.
<T
MAX.
4.5V<V
CC
<32V
T
MIN.
<T
AMB.
<T
MAX.
T
MIN.
<T
AMB.
<T
MAX.
T
MIN.
<T
AMB.
<T
MAX.
V
CS
=2V, T
MIN.
<T
AMB.
<T
MAX.
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www.unisonic.com.tw
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QW-R105-028.B
UM601/A
Preliminary
LINEAR INTEGRATED 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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QW-R105-028.B
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