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TD34063 Schematic ( Datenblatt PDF ) - TMC

Teilenummer TD34063
Beschreibung DC TO DC CONVERTER CONTROLLER
Hersteller TMC
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Gesamt 9 Seiten
		
TD34063 Datasheet, Funktion
TMC
TD34063
DC TO DC CONVERTER CONTROLLER
DESCRIPTION
T he TD34063 Series is a monolithic control circuit containing the
primary functions required for DC to DC converters. T hes, e 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. T his 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
*Operation from 3.0V to 40V.
*Short circuit current limiting.
*Low standby current.
*Output switch current of 1.5A without external
transistors.
*Frequency of operation from 100Hz to 100kHz.
*Step-up, step-down or inverting switch regulators.
BLOCK DIAGRAM
SWITCH
COLLECTOR
1
SWITCH
EMITTER
2
TIMING
CAPACITOR
3
E
T2
T1
A
S
Q
R
C
Is
CT
OSCILLATOR
GND
4
1.25Vref
COMP.
D
B
8
DRIVE
COLLECTOR
7
Ipeak
SENSE
6 Vcc
5 COMPARATOR
INVERTING INPUT
SOP-8
DIP-8
PIN CONFIGURATION
Switch
Collector
Switch
Emitter
Timing
Capacitor
Gnd
1
2
3
4
Driver
8 Collector
7 Ipk Sense
6 Vcc
Comparator
5 Inverting input
ORDERING INFORMATION
Device
TD34063
TD34063
Operating
Temperature Range
TA = 0°C to +70°C
TA = 0°C to +70°C
Package
PDIP-8
SOP-8
1






TD34063 Datasheet, Funktion
Figure 5. Step-Up Converter
TD34063
Test
Line Regulation
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Filter
Condition
Vin = 8.0 V to 16 V, Io = 175 mA
Vin = 12 V, Io = 75 mA to 175 mA
Vin = 12 V, Io = 175 mA
Vin = 12 V, Io = 175 mA
Vin = 12 V, Io = 175 mA
Results
30 mV = ± 0.05%
10 mV = ± 0.017%
400 mVpp
87.7%
40 mVpp
Figure 6. External Current Boost Connections for Ic Peak Greater than 1.5 A
6a. External NPN Switch
6 b. External NPN Saturated Switch
(See Note 5 )
Note 5: 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 us 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.
TMC
6

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