IP35063J-883B Просмотр технического описания (PDF) - Semelab - > TT Electronics plc
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IP35063J-883B Datasheet PDF : 5 Pages
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IP35063
IP33063
IP34063
DESCRIPTION
The IP34063 series of control circuits contains all the
functions required to implement DC–DC converters.
Included are internal voltage reference, comparator,
controlled duty cycle oscillator with current limit circuit,
driver, and high current output switch. This series was
specifically designed to be incorporated in Step-Down
(Buck) and Step-Up (Boost) applications with a minimum
number of external components.
Driver 8
Collector
7
Ipk Sense
6
V CC
Comparator 5
Inverting
Input
1
SQ
Q2
R
Q1
170
Ω
2
Switch
Collector
Switch
Emitter
OSCILLATOR
COMPARATOR
1.25 V
REFERENCE
REGULATOR
3
Timing
Capacitor
4
Gnd
ELECTRICAL CHARACTERISTICS (Test Parameters unless otherwise stated : VCC = 5V , TJ = 25°C)
Parameter
Test Conditions
Min. Typ. Max. Units
OSCILLATOR
Charging Current
Discharge Current
Voltage Swing
VCC = 5 to 40V
VCC = 5 to 40V
20
35
50
µA
150
200
250 µA
0.5
Vpp
Discharge to Charge Current Ratio
Current Limit Sense Voltage
OUTPUT SWITCH
Ipk(sense) = VCC
Ichg = Idischg
6.0
—
250
300
350 mV
Saturation Voltage, Darlington Connection * ISW = 1.0A
Saturation Voltage *
ISW = 1.0A
IC(Driver) = 50mA (Forced β = 20)
DC Current Gain
ISW = 1.0A , VCE = 5.0V
Collector Off–State Current
VCE = 40V
COMPARATOR
1
1.3
V
0.45
0.7
V
35
120
—
10
nA
Threshold Voltage *
1.18
1.25
1.32
V
Threshold Voltage Line Regulation *
Input Bias Current *
TOTAL DEVICE
VCC = 3 to 40V
VIN = 0V
0.04
0.2 mV/V
40
400 nA
Supply Current *
VCC = 5 to 40V CT = 0.001µF
Ipk(sense) = VCC VPIN 5 > Vth
Pin 2 = Gnd , Remaining Pins Open.
2.4
3.5 mA
NOTES
* Applies over full operating temperature range (see order information).
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 2/95
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