UTC UM601/A
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R121-001,A
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.
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 gnerator with enable / disable function
*4.5 to 32V supply voltage range
DIP-8
SOP-8
APPLICATON
*
Battery charger with a constant voltage and a limited
output current
*Every types of application requiring a precision
voltage regulation and current limitation
*Voltage supervisors
*Over voltage protection
PIN CONFIGURATION
UTC UM601/A
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R121-001,A
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL VALUE
UNIT
DC Supply Voltage (note 1)
Vcc
36
V
Output Current (note 2)
Iout
20
mA
Power Dissipation
Pd
200
mW
Input Voltage (note 3)
Vin
-0.3, Vcc-1.5
V
Input Current
Iin
1
mA
Storage Temperature
Tstg
-40 to +125
C
Maximum Junction Temperature
Tj
150
C
Thermal Resistance Junction to
Ambient
Tthja
130 to 200
C/W
OPERATING CONDITIONS
PARAMETER
SYMBOL VALUE
UNIT
Supply Voltage
Vcc
4.5 to 32
V
Operating Free Air Temperature
Topr
Tmin. to Tmax.
C
ELECTRICAL CHARACTERISTICS
( Ta=25
C , Vcc=15V,
unless otherwise specified)
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP.
MAX
UNIT
Total Supply Current
Icc
Vcc=15V
2
mA
Input Voltage
Vi
0
Vcc-1.5
V
Input Offset Voltage
Vio
25
C
Tmin.<Tamb.<Tmax
-5
-7
1 5
7
mV
Input Bias Current
Iib
@Vin=1.2V on pin 7 and
Vin=0V on pin5
25
C
Tmin.<Tamb.<Tmax.
-700
-1000
-300
0
0
nA
Output Sink Current
Isink
Vo1=2.5V
25
C
Tmin.<Tamb.<Tmax.
8
15
mA
Large Signal Voltage Gain
Avo
R
L
=2k
Tmin.<Tamb.<Tmax.
15
V/mV
Supply Voltage Rejection Ratio
SVR
Tmin.<Tamb.<Tmax
65
90
dB
Common Mode Rejection Ratio
CMR
Tmin.<Tamb.<Tmax
80
dB
Gain Bandwidth Product
GBP
Vcc=15V, F=100kHz,
Vin=10mV, R
L
=2k
,
C
L
=100pF
1
MHz
Output Leakage Current
Ioh
25
C
Tmin.<Tamb.<Tmax
2
7
A
ELECTRICAL CHARACTERISTICS
( Ta=25
C , Vcc=15V,
unless otherwise specified)
VOLTAGE REFERENCE: UM601
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Reference Voltage
Vref
Iout=1mA, Tamb.=25
C
1.21 1.24 1.27 V
Temperature Stability
Kvt
Tmin.<Tamb.<Tmax.
30
100
ppm/
C
Load Regulation
Reglo
1<Iout<10mA
5
15
mV
Line Regulation
Regli
5<Vin<32V
3.5
10
mV
UTC UM601/A
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R121-001,A
VOLTAGE REFERENCE: UM601A
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Reference Voltage
Vref
Iout=1mA, Tamb.=25
C
1.227 1.240 1.252 V
Temperature Stability
Kvt
Tmin.<Tamb.<Tmax.
30
100
ppm/
C
Load Regulation
Reglo
1<Iout<10mA
5
15
mV
Line Regulation
Regli
5<Vin<32V
3.5
10
mV
CURRENT GENERATOR UM601/UM601A
PARAMETER SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Current
Source
Io
1.4 mA
Temperature Stability
Kcgt
Tmin.<Tamb.<Tmax.
500
ppm/
C
Line Regulation
Cglir
4.5V<Vcc<32V
0.003
0.030
mA
Voltage at the enable pin to have
Io=1.4mA
Vcsen Tmin.<Tamb.<Tmax. 0.6 V
Voltage at the enable pin to have
Io=0mA
Vcsdis Tmin.<Tamb.<Tmax. 2 V
Input Current on the Csen pin
Icsen
Tmin.<Tamb.<Tmax.
30
A
Leakage Current
Icsleak
Vcs=2V
Tmin.<Tamb.<Tmax.
0.5 2
A
DESCRIPTION
PIN NAME
TYPE
FUNCTION
1
Vref
OUTPUT
Voltage Reference Output 1.24V, 10mA max. Do not short circuit
7
Vrin
INPUT
Voltage Regulation Loop Input
5
Crin
INPUT
Current Limitation Loop Input, connected to the sense resistor
3
Crref
INPUT
Current Limitation Reference Input
2
Csen
INPUT
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
6
OUTPUT
OUTPUT
Output pin common to the voltage regulation and current limitation loops. This
output can drive the primary side (LED) of an optocoupler
8
Vcc
INPUT
Power Supply Input (4.5 to 32VDC)
4 GND
INPUT
Ground
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