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MC34063A PDF даташит

Спецификация MC34063A изготовлена ​​​​«HTC» и имеет функцию, называемую «DC-DC Converter Control Circuits».

Детали детали

Номер произв MC34063A
Описание DC-DC Converter Control Circuits
Производители HTC
логотип HTC логотип 

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MC34063A Даташит, Описание, Даташиты
DC-DC Converter Control Circuits
MC34063A
● OUTPUT SWITCH CURRENT IN EXCESS OF
1.5A
2% REFERENCE ACCURACY
LOW QUIESCENT CURRENT:2.5mA(TYP.)
OPERATING FROM 3V TO 40V
REQUENCY OPERATION TO 100KHz
ACTIVE CURRENT LIMITING
DESCRIPTION
The MC34063A series is a monolithic control
circuit delivering the main functions for DC-DC
voltage converting.
The device contains an intermal temperature
compensated reference, comparator, duty cycle
controlled oscillator with an active current limit
circuit driver and high current output switch.
Output voltage is adjustable through two external
resistors with a 2% reference accuracy.
Employing a minimum number of external
components the MC34063A devices series is
designed for Step-Down, Step-Up and
Voltage-lnverting applications.
8 SOP/ 8 DIP PIN Configulation
Switch
Collector
Switch
Emitter
1
2
8
Drive
Collector
7 Ipk Sense
Timing
Capacitor
3
Ground 4
6 Vcc
5
Comparator
- Input
ORDERING INFORMATION
Device
Package
MC34063AD
8 SOP
MC34063AN
8 DIP
BLOCK DIAGRAM
Drive
Collector
8
sQ
R
Switch
Q2 1 Collector
Q1
Ipk Sense 7
Vcc 6
Comparator
lnverting
5
input
Ipk Oscillator
Comparator
+
-
1.25V
Reference
Regulator
2
Switch
Emitter
3
Timing
Capacitor
4 GND
HTC
1









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MC34063A Даташит, Описание, Даташиты
DC-DC Converter Control Circuits
ABSOLUTE MAXIMUM RATINGS
SYMBOL
Vcc
Vir
VSWC
VSWE
VCE
Vdc
Idc
Isw
Ptot
Top
PARAMETER
Power Supply Voltage
Comparator input Voltage Range
Switch Collector Voltage
Switch Emitter Voltage (VSWC=40V)
Switch Collector to Emitter Voltage
Driver Collector Voltage
Driver Collector Current
Switch Current
Power Dissipation at Tamb=25℃(for Plastic Package )
(for SOIC Package )
Operating Ambient Temperature Range
Tstg Storage Temperature Range
Absolute Maximum Rating are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
MC34063A
VALUE
50
-0.3 to 40
40
40
40
40
100
1.5
1.25
0.625
0 to 70
-40 to 150
UNIT
V
V
V
V
V
V
A
W
THERMAL DATA
SYMBOL
PARAMETER
Rthi-amb Thermal Resistance Junction-ambient (*)
Max
(*) This Value depends from thermal design of PCB on which the device is mounted.
DIP-8
100
SO-8
160
UNIT
℃/w
CONNECTION DIAGRAM (top view)
SWC
SWE
TC
GND
1
4
8 DRC
IPK
VCC
5 CII
SC11080
PIN CONNECTIONS
PIN NO
1
2
3
4
5
6
7
8
SYMBOL
SWC
SWE
TC
GND
CII
Vcc
IPK
DRC
NAME AND FUNCTION
Switch Collector
Switch Emitter
Timing Capactor
Ground
Comparator lnverting lnput
Voltage Supply
IPK Sense
Voltage Driver Collector
HTC
2









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MC34063A Даташит, Описание, Даташиты
DC-DC Converter Control Circuits
MC34063A
ELECTRICAL CHARACTERISTICS( Refer to the test circuits, VCC=5V, Ta=TLOW to THIGH, unless
otherwise specified, see note 2)
OSCILLATOR
SYMBOL
PARAMETER
FOSC Frequency
Ichg Charge Current
Idischg Discharge Current
Idischg/Ichg Discharge to Charge Current Ratio
Vipk(sense) Current Limit Sense Voltage
TEST CONDITIONS
Vpin5= 0 V ,CT= 1nF ,Ta= 25oC
VCC= 5 to 40V ,Ta= 25oC
VCC= 5 to 40V ,Ta= 25oC
Pin 7= VCC ,Ta= 25oC
Ichg= Idischg ,Ta= 25oC
MIN.
24
24
140
5.2
250
TYP.
33
33
200
6.2
300
MAX. UNIT
42 KHz
42 ㎂
260 ㎂
7.5
350 ㎷
OUTPUT SWITCH
SYMBOL
PARAMETER
VCE(sat) Saturation Voltage,
Darlington connection
VCE(sat) Saturation Voltage
hFE
IC(off)
DC Current Gain
Collector Off-State Current
TEST CONDITIONS
MIN. TYP. MAX. UNIT
ISW= 1A ,Pins 1,8 connected
1 1.3 V
ISW= 1A ,Rpin8= 82Ω to VCC,
Forced β ~ 20
ISW= 1A, VCE= 5V, Ta= 25oC
VCE= 40V
0.45 0.7 V
50 120
0.01 100 ㎂
COMPARATOR
SYMBOL
PARAMETER
Vth Threshold Voltage
Regline Threshold Voltage Line Regulation
IIB Input Bias Current
TEST CONDITIONS
Ta= 25oC
Ta= TLOW to THIGH
VCC= 3 to 40V
VIN= 0V
MIN.
1.225
1.21
TYP.
1.25
1
-5
MAX. UNIT
1.275 V
1.29 V
5㎷
-400 ㎁
TOTAL DEVICE
SYMBOL
PARAMETER
ICC Supply Current
VSTART-UP Start-up Voltage(note 4)
TEST CONDITIONS
MIN.
VCC= 5 to 40V, CT=1㎋
Pin7= VCC ,Vpin5>Vth, Pin2=GND
Remaining pins open
for MC34063A
Ta= 25oC ,CT=1㎌ ,Pin5= 0V
for MC34063A
TYP.
2.5
2.1
MAX. UNIT
4㎃
V
Notes:
1) Maximum package power dissipation limit must be observed.
2) TLOW= 0oC, THIGH= 70oC
3) If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch.
The resulting switch-off time may be adversely affected.
In a Darlington configuration the following output driver condition is suggested:
Forced β of output current switch= ICOUTPUT/(ICDRIVER-1㎃*)≥10
* Current less due to a built in 1KΩ antileakage resistor.
4) Start-up Voltage is the minimum Power Supply Voltage at which the internal oscillator begains to work.
HTC
3










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