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參數(shù)資料
| 型號： | MC34063AB |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | DC/DC變換器 |
| 英文描述： | DC-DC CONVERTER CONTROL CIRCUITS |
| 中文描述： | DC - DC變換器控制電路 |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 130K |
| 代理商： | MC34063AB |
ELECTRICALCHARACTERISTICS
(Refer to the test circuits, V
CC
= 5V,T
a
= T
LOW
to T
HIGH
, unless
otherwisespecified,see note 2)
OSCILLATOR
Symbol
f
OSC
I
chg
I
dischg
I
dischg
/I
chg
Discharge toCharge
Current Ratio
V
ipk(sense)
Current Limit Sense Voltage
Parameter
Test Conditions
C
T
= 1 nF
T
a
= 25
o
C
T
a
= 25
o
C
T
a
= 25
o
C
Min.
24
Typ.
33
Max.
42
Unit
KHz
μ
A
μ
A
Frequency
V
pin5
= 0 V
V
CC
= 5 to 40V
V
CC
= 5 to 40V
Pin 7 = V
CC
T
a
= 25
o
C
Charge Currernt
24
33
42
Discharge Current
140
200
260
5.2
6.2
7.5
I
chg
= I
dischg
T
a
= 25
o
C
250
300
350
mV
OUTPUT SWITCH
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
CE(sat)
SaturationVoltage,
Darlington Connection
SaturationVoltage
I
SW
= 1 A
Pins1, 8 connected
1
1.3
V
V
CE(sat)
I
SW
= 1 A
Forced
β
~ 20
I
SW
= 1 A
V
CE
= 40 V
R
pin8
= 82
toV
CC
,
0.45
0.7
V
h
FE
I
C(off)
DCCurrent Gain
V
CE
= 5 V
T
a
= 25
o
C
50
120
Collector Off-StateCurrent
0.01
100
μ
A
COMPARATOR
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
th
Threshold Voltage
T
a
= 25
o
C
T
a
= T
LOW
to T
HIGH
V
CC
= 3 to 40V
1.225
1.21
1.25
1.275
1.29
V
V
Reg
line
Threshold VoltageLine
Regulation
Input Bias Current
1
5
mV
I
IB
V
IN
= 0 V
-5
-400
nA
TOTAL DEVICE
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
CC
Supply Current
V
CC
= 5 to 40V
Pin 7 = V
CC
Remaining pins open
C
T
= 1 nF
V
pin5
> V
th
Pin2 = GND
2.5
4
mA
NOTES:
1) Maximum package power dissipation limit must be observed.
2) T
LOW
= 0
C, T
HIGH
=70
C (AC series); T
LOW
= -40
C, T
HIGH
= 85
o
C (ABseries).
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 = I
COUTPUT
/(I
CDRIVER
- 1mA*)
≥
10
* Current less due to a built in 1K
antileakageresistor.
MC34063A
3/15
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