OGFD34063D circuit Datasheet

OGFD34063D Datasheet, PDF, Equivalent


Part Number

OGFD34063D

Description

monolithic control circuit

Manufacture

OGFD

Total Page 10 Pages
Datasheet
Download OGFD34063D Datasheet


OGFD34063D
OGFD34063D
The 34063D 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
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
http://ic.goford.cn TEL:0755-86350980 FAX:0755-86350963
Symbol
VCC
VIR
VC(switch)
VE(switch)
VCE(switch)
IC(driver)
IC(driver)
ISW
PD
RθJA
PD
RθJA
TJ
TA
Tstg
Value
40
-0.3 to
+40
40
40
40
40
100
1.5
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
A
1.25 W
100 °C/W
625 mW
160 °C/W
+150
°C
0 to +70 °C
-65to+150 °C

OGFD34063D
OGFD34063D
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)
fosc
Ichg
24
24
Discharge Current (VCC = 5.0 V to 40 V, TA = 25°C) Idischg
140
Discharge to Charge Current Ratio (Pin7 to Vcc, TA=25°C) Idischg/Ichg 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 VCE(sat)
1, 8 connected)
Saturation Voltage (ISW = 1.0 A, RPin 8 = 82 to VCC.
Forced β = 20)
DC Current Gain (ISW = 1.0 A, VCE = 5.0 V, TA = 25°C)
Collector Off-State Current (VCE = 40V)
VCE(sat)
hFE
IC(off)
50
COMPARATOR
Threshold Voltage (TA = 25°C)
(TA = TLOW to THIGH)
Vth 1.225
1.21
Threshold Voltage Line Regulation (VCC = 3 0 V to 40 V) Regline
Input Bias Current (Vin=0V)
IIB
TOTAL DEVICE
Supply Current (VCC = 5 0 V to 40 V, CT = 1 0 nF, Vpin7 =
VCC. VPin5 > Vth, Pin 2 = Gnd, Remaining pins open)
ICC
Max Unit
42 kHz
42 µA
260 µA
7.5 —
350 mV
1.3 V
0.7 V
——
100 µA
1.275
1.29
5.0
-400
V
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
http://ic.goford.cn TEL:0755-86350980 FAX:0755-86350963
2


Features OGFD34063D The 34063D is a monolithic c ontrol circuit containing the primary f unctions required for DC-to-DC converte rs. These devices consist of an interna l temperature compensated reference, co mparator, controlled duty cycle oscilla tor with an active current limit circui t, driver and high current output switc h. This series was specifically designe d to be incorporated in Step-Down and S tep-Up and Voltage-Inverting applicatio ns with a minimum number of external co mponents. FEATURES FUNCTIONAL BLOCK D IAGRAM • Operation from 3.0 V to 40 V Input • Low Standby Current • Cur rent Limiting • Output Switch Current to 1.5 A • Output Voltage Adjustable • Frequency Operation to 100 kHz • Precision 2% Reference MAXIMUM RATING S Rating Power Supply Voltage Comparato r Input Voltage Range Switch Collector Voltage Switch Emitter Voltage (Vpin 1 = 40 V) Switch Collector to Emitter Vol tage Driver Collector Voltage Driver Co llector Current (Note 1) Switch Current Power Dissipation and T.
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