3563 [UTC]
LINEAR INTEGRATED CIRCUIT; 线性集成电路
| 型号： | 3563 |
| 厂家： | 
Unisonic Technologies |
| 描述： | LINEAR INTEGRATED CIRCUIT |
| 文件： | 总10页 (文件大小：163K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTC 3563
LINEAR INTEGRATED CIRCUIT
HIGH-EFFICIENCY DC/DC
CONVERTER
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
SOP-8
DIP-8
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.
FEATURES
APPLICATIONS
*3V to 30V input voltage operation.
*Internal 2A peak current switch.
*1.5A continuous output current.
*Bootstrapped driver.
*Constant current source for battery chargers.
*Saver for cellular phones.
*Step-Down DC-DC converter module.
*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.
PIN CONFIGURATION
DC
DE
BOOST
IS
1
2
3
4
8
7
6
5
CF
VCC
FB
GND
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
PIN SYMBOL
DESCRIPTION
2A switch collector
Darlington switch emitter
Oscillator timing capacitor
PIN SYMBOL
DESCRIPTION
Feedback comparator inverting input
Power supply input
Highside current sense input
(VCC-VIS=300mV)
1
2
3
DC
DE
CF
5
6
7
FB
VCC
IS
4
GND
Power ground
8
BOOST Bootstrapped driver collector
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
Supply Voltage
SYMBOL
VCC
VALUE
UNIT
30
V
V
V
V
V
V
A
Comparator input voltage range
Switch collector voltage
Switch emitter Voltage
Vi
-0.3~+30
VC(switch)
VE(switch)
VCE(switch)
VC(driver)
ISW
30
30
30
30
2
Switch collector to emitter voltage
Driver collector Voltage
Switch current
Power dissipation (Ta=25°C)
1000
625
mW
mW
DIP-8
SOP-8
Thermal Resistance
DIP-8
100
160
°C/W
°C/W
°C
°C
°C
SOP-8
Operating junction temperature
Operating ambient temperature range
Storage temperature range
Tj
Ta
Tstg
125
0~+70
-65~+150
ELECTRICAL CHARACTERISTICS (VCC=5.0V, Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP.
MAX
UNIT
Oscillator
Charging Current
Discharging Current
Voltage Swing
ICHG
IDISCHG
Vosc
10
25
150
0.6
6.0
40
200
5V≤VCC≤30V
5V≤VCC≤30V
PIN 3
µA
µA
V
100
Discharge to Charge Current Ratio IDISCHG /
ICHG
Current limit Sense Voltage
VIS=VCC
VCC -VIS
ICHG=IDISCHG
250
35
300
350
mV
Output Switch
Saturation Voltage,
VCE(SAT)
VCE(SAT)
hFE
IDE=1.0A,
VBOOST=VDC=VCC
IDC=1.0A, IBOOST=50mA,
(Forced β≈20)
ISC=1.0A
1.5
0.4
120
10
1.8
0.7
V
V
Emitter Follower Connection
Saturation Voltage
DC Current Gain
VCE=5.0V
VCE=30V
Collector Off State Current
Comparator
IC(OFF)
nA
Threshold Voltage
VFB
1.225 1.250 1.275
V
V
mV/V
µA
mA
Ta=25°C
0°C≤Ta≤70°C
3V≤VCC≤30V
VIN=0V
1.210
1.290
0.3
1.0
3.0
Threshold voltage Line Regulation REGLINE
Input Bias Current
Supply Current
0.1
0.4
1.6
IIB
ICC
VIS=VCC, PIN 5>VFB,
5.0V≤VCC≤30V, CT=1nF,
PIN 2=GND, Remaining
pins open
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
TYPICAL APPLICATION CIRCUIT
EFFICIENCY vs OUTPUT CURRENT
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
DESIGN FORMULA TABLE
CALCULATION
STEP-DOWN
VOUT+VF
VIN(MIN)-VSAT-VOUT
STEP-UP
OUT+VF-VIN(MIN)
VIN(MIN)-VSAT
tON/tOFF
V
(tON+tOFF
CT
)
1/FMIN
1/FMIN
4x10-5tON
tON + tOFF
MAX
4x10-5tON
IC(SWITCH)
2IOUT(MAX)
2IOUT(MAX)
(
)
tOFF
0.3/IC(SWITCH)
VIN(MIN) - VSAT
RS
0.3/IC(SWITCH)
VIN(MIN)-VSAT-VOUT
L(MIN)
(
) tON(MAX)
(
) tON(MAX)
IOUT tON
VRIPPLE(P-P)
IC(SWITCH)
IC(SWITCH) (tON+tOFF
IC(SWITCH)
)
Co
8VRIPPLE(P-P)
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
V
OUT : 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.
APPLICATION EXAMPLES
Fig. 1 Simplified Battery Charge Circuit for Ni-Cd/Ni-MH Battery
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
Fig.2 Battery Charge Circuit for Fluctuating Charging Current Applications
Fig. 3 Step-Down Converter
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)
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
Fig. 4 Step-Down Converter with External 5V Bootstrap
Fig. 5 Step-Up Converter
Line regulation: 100mV (VIN=8V~16V, @Io=200mA)
Load regulation: 40mV (VIN=12V, @IO=80mA~200mA)
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
LINEAR INTEGRATED CIRCUIT
Fig. 6 Step-Up Converter with External NPN Switch
Fig. 7 Inverting Converter
Line regulation: 20mV (VIN=4.5V~6V, @IO=100mA)
Load regulation: 100mV (VIN=5V, @IO=10mA~100mA)
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
UTC 3563
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.
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UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R103-013,B
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