Datasheet

UNISONIC TECHNOLOGIES CO., LTD
3563
CMOS IC
PC POWER SUPPLY
SUPERVISORS

DESCRIPTION
The UTC 3563 is a monolithic control circuit containing the
primary functions required for DC to DC converters and
highside-sensed constant current source. The device consists of
an internal temperature compensated reference, comparator,
controlled duty cycle oscillator with an active current sense circuit,
bootstrapped driver, and high current output switch. This device is
specifically designed to construct a constant current source for
battery chargers with a minimum number of external components.
Bootstrapped driver can drive the NPN output switch to saturation
for higher efficiency and less heat dissipation. The UTC 3563 can
deliver 1.5A continuous current without requiring a heat sink.

APPLICATIONS
*Constant current source for battery chargers.
*Saver for cellular phones.
*Step-Down DC-DC converter module.

FEATURES
* 3V to 30V input voltage operation.
* Internal 2A peak current switch.
* 1.5A continuous output current.
* Bootstrapped driver.
* High side current sense capability.
* High efficiency (up to 90%)
* Internal 2% reference.
* Low quiescent current at 1.6mA.
* Frequency operation from 100Hz to 100KHz
■
ORDERING INFORMATION
Ordering Number
Lead Free
3563L-D08-T
-
Halogen Free
3563G-D08-T
3563G-S08-R
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Package
Packing
DIP-8
SOP-8
Tube
Tape Reel
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CMOS IC
MARKING
DIP-8

SOP-8
PIN CONFIGURATION
DC 1
8
BOOST
2
7
IS
CF 3
6
VCC
GND 4
5
FB
DE

PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
SYMBOL
DC
DE
CF
GND
FB
VCC
IS
BOOST
DESCRIPTION
2A switch collector
Darlington switch emitter
Oscillator timing capacitor
Power ground
Feedback comparator inverting input
Power supply input
Highside current sense input (VCC-VIS=300mV)
Bootstrapped driver collector
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CMOS IC
BLOCK DIAGRAM
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CMOS IC
ABSOLUTE MAXIMUM RATINGS (TA=25C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
30
V
Comparator input voltage range
VI
-0.3~+30
V
Switch collector voltage
VC(switch)
30
V
Switch emitter Voltage
VE(switch)
30
V
Switch collector to emitter voltage
VCE(switch)
30
V
Driver collector Voltage
VC(driver)
30
V
Switch current
ISW
2
A
DIP-8
1000
mW
Power dissipation
PD
SOP-8
625
mW
Operating junction temperature
Tj
125
C
Operating ambient temperature range
TA
-20~+85
C
Storage temperature range
TSTG
-65~+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
Junction to Ambient
Junction to Case

SYMBOL
θJA
θJC
RATINGS
100
160
UNIT
°C/W
°C/W
ELECTRICAL CHARACTERISTICS (VCC=5.0V, TA=25C, unless otherwise specified)
PARAMETER
Oscillator
Charging Current
Discharging Current
Voltage Swing
Discharge to Charge Current
Ratio
Current limit Sense Voltage
Output Switch
Saturation Voltage,
Emitter Follower Connection
Saturation Voltage
DC Current Gain
Collector Off State Current
Comparator
SYMBOL
ICHG
IDISCHG
VOSC
5VVCC30V
5VVCC30V
PIN 3
MIN
TYP
MAX
UNIT
10
100
25
150
0.6
40
200
μA
μA
V
300
350
mV
1.5
1.8
V
0.4
0.7
V
IDISCHG / ICHG VIS=VCC
VCC -VIS
ICHG=IDISCHG
VCE(SAT)
IDE=1.0A, VBOOST=VDC=VCC
VCE(SAT)
hFE
IC(OFF)
IDC=1.0A, IBOOST=50mA,
(Forced 20)
ISC=1.0A, VCE=5.0V
VCE=30V
VFB
TA=25C
0CTA70C
REGLINE
Threshold Voltage
Threshold voltage Line
Regulation
Input Bias Current
TEST CONDITIONS
Supply Current
IIB
ICC
250
35
1.225
1.210
120
10
nA
1.250
1.250
1.275
1.290
V
V
3VVCC30V
0.1
0.3
mV/V
VIN=0V
VIS=VCC, PIN 5>VFB,
5.0VVCC30V, CT=1nF,
PIN 2=GND, Remaining pins open
0.4
1.0
μA
1.6
3.0
mA
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CMOS IC
TYPICAL APPLICATION CIRCUIT
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CMOS IC
TEST CIRCUIT
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CMOS IC
APPLICATION INFORMATION
Tabel 1. DESIGN FORMULA TABLE
CALCULATION
STEP-DOWN
VOUT + VF
VIN(MIN) -VSAT -VOUT
STEP-UP
VOUT + VF -VIN(MIN)
(tON+tOFF)MAX
CT
1 / FMIN
4x10-5 tON
IC(SWITCH)
2IOUT(MAX)
1 / FMIN
4x10-5 tON
t +t
2IOUT(MAX ) ON OFF
tOFF
RS
0.3 / IC(SWITCH)
VIN(MIN) -VSAT -VOUT
tON(MAX )
IC(SWITCH)
0.3 / IC(SWITCH)
VIN(MIN) - VSAT
t
IC( SWITCH) ON(MAX )
(
IOUT tON
VRIPPLE(P-P )
tON / tOFF
L(MIN)
Co
IC(SWITCH) tON + t OFF
8VRIPPLE(P-P )
VIN(MIN) -VSAT
)
VSAT : Saturation voltage of the output switch
VF : Forward voltage of the ringback rectifier
The following power supply characteristics must be chosen:
VIN : Norminal input voltage
VOUT : Desired output voltage, VOUT=1.25(1+RB/RA)
IOUT : Desired output current
FMIN : Minimum desired switching frequency at selected values for VIN AND IOUT
VRIPPLE(P-P) : Desired peak-to-peak output ripple voltage. In practice, the calculated value will need to be increased
due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept to
a low value since it will directly affect the line and load regulation.
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CMOS IC
APPLICATION EXAMPLES
Fig. 1 Simplified Battery Charge Circuit for Ni-Cd/Ni-MH Battery
Fig.2 Battery Charge Circuit for Fluctuating Charging Current Applications
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CMOS IC
APPLICATION EXAMPLES (Cont.)
Line regulation: 40mV (VIN=10V~20V, @ IO=1A)
Load regulation: 20mV (VIN=15V, @ IO=100mA~1A)
Short circuit current: 1.3A (VIN=15V, @ RL=0.1Ω)
Fig. 3 Step-Down Converter
Fig. 4 Step-Down Converter with External 5V Bootstrap
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CMOS IC
APPLICATION EXAMPLES (Cont.)
Line regulation: 100mV (VIN=8V~16V, @ IO=200mA)
Load regulation: 40mV (VIN=12V, @ IO=80mA~200mA)
Fig. 5 Step-Up Converter
Fig. 6 Step-Up Converter with External NPN Switch
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CMOS IC
APPLICATION EXAMPLES (Cont.)
Line regulation: 20mV (VIN=4.5V~6V, @ IO=100mA)
Load regulation: 100mV (VIN=5V, @ IO=10mA~100mA)
Fig. 7 Inverting Converter
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CMOS IC
TYPICAL CHARACTERISTICS
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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