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34063AD 반도체 회로 부품 판매점

DC-TO-DC CONVERTER CONTROL CIRCUITS



System Logic Semiconductor 로고
System Logic Semiconductor
34063AD 데이터시트, 핀배열, 회로
DC-TO-DC CONVERTER CONTROL CIRCUITS
SL34063A
The SL34063A is a monolithic control circuit containing the primary functions required for DC-to-DC converters. These
devices consist of an internal temperature compensated reference, comparator, controlled duty cycle oscillator with
an active current limit circuit, driver and high current output switch. This series was specifically designed to be
incorporated in Step-Down and Step-Up and Voltage-Inverting applications with a minimum number of external
components.
FEATURES
FUNCTIONAL BLOCK DIAGRAM
Operation from 3.0 V to 40 V Input
Low Standby Current
Current Limiting
Output Switch Current to 1.5 A
Output Voltage Adjustable
Frequency Operation to 100 kHz
Precision 2% Reference
MAXIMUM RATINGS
Rating
Power Supply Voltage
Comparator Input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (Vpin 1 = 40 V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current (Note 1)
Switch Current
Power Dissipation and Thermal Characteristics
Ceramic Package, U Suffix TA = +25°C
Thermal Resistance
Plastic Package, P Suffix TA = +25°C
Thermal Resistance
SOIC Package, D Suffix TA = +25°C
Thermal Resistance
Operating Junction Temperature
Operating Ambient Temperature Range
Storage Temperature Range
System Logic
SLS
Semiconductor
Symbol
VCC
VIR
VC(switch)
VE(switch)
VCE(switch)
IC(driver)
IC(driver)
ISW
PD
RθJA
PD
RθJA
PD
RθJA
TJ
TA
Tstg
Value
Unit
40 Vdc
-0.3 to +40 Vdc
40 Vdc
40 Vdc
40 Vdc
40 Vdc
100 mA
1.5 A
1.25
W
100 °C/W
1.25
W
100 °C/W
625 mW °C/
160 W
+150
°C
0 to +70 °C
-65to+150 °C
1


34063AD 데이터시트, 핀배열, 회로
SL34063A
ORDERING INFORMATION
Device Temperature Range Package
34063AD 0° to +70°C
SO-8
34063AP1
Plastic DIP
Pin connection
ELECTRICAL CHARACTERICISTICS
(VCC = 5.0 V, TA= 0 to +70oC unless otherwise specified.)
Characteristics
Symbol Min
OSCILLATOR
Frequency (VPin 5 = 0 V, CT = 1.0 nF, TA = 25°C)
Charge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C)
Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25°C)
fosc
Ichg
Idischg
Idischg/Ichg
24
24
140
5.2
Current Limit Sense Voltage (Ichg = Idischg, TA = 25°C) Vlpk(sense) 250
OUTPUT SWITCH (Note 3)
Saturation Voltage, Darlington Connection (ISW = 1.0 A,
Pins 1, 8 connected)
VCE(sat)
Saturation Voltage (ISW = 1.0 A, RPin 8 = 82 to VCC. VCE(sat)
Forced β = 20)
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C) hFE
Collector Off-State Current (VCE = 40V)
IC(off)
COMPARATOR
50
Threshold Voltage (TA = 25°C)
(TA = TLOW to THIGH)
Vth 1.225
1.21
Threshold Voltage (TA = 25°C) **
Vth 1.2375
Typ
33
33
200
6.2
300
1.0
0.45
120
0.01
1.25
1.25
Threshold Voltage Line Regulation (VCC = 3 0 V to 40 V) Regime
Input Bias Current (Vin=0V)
IIB
TOTAL DEVICE
Supply Current (VCC = 5 0 V to 40 V, CT = 1 0 nF, Vpin7 = VCC. ICC
VPin5 > Vth, Pin 2 = Gnd, Remaining pins open)
1.4
-40
2.5
Max Unit
42 kHz
42 µA
260 µA
7.5 —
350 mV
1.3 V
0.7 V
——
100 µA
1.275 V
1.29
1.2625 V
5.0
-400
mV
nA
4.0 mA
NOTES:
1. Maximum package power dissipation limits must be observed.
2.Low duty cycle pulse techniques are used during test to maintain Junction temperature as close to ambient temperature as
possible
3.If the output switch is driven into hard saturation (non Darlington configuration) at low switch currents (< 300 mA) and high
driver currents (>30 mA), it may take up to 2.0 µs to come out of saturation This condition will shorten the off' time at
frequencies > 30 kHz, and is magnified at high temperatures This condition does not occur with a Darlington configuration,
since the output switch cannot saturate If a non Darlington configuration is used, the following output drive condition is
recommended
Forced β of output switch = IC, output/(Ic, driver -7.0 mA*) > 10
*The 100 . resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts
**Possible version for shipment
System Logic
SLS
Semiconductor
2




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