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參數(shù)資料
| 型號： | UTCUC3842A |
| 廠商： | 友順科技股份有限公司 |
| 英文描述： | CURRENT MODE PWM CONTROL CIRCUITS |
| 中文描述： | 電流模式PWM控制電路 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大小： | 114K |
| 代理商： | UTCUC3842A |
UTC UC3842A / 3843A
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R103-002,A
PARAMETER
SYMBOL
D
(MIN)
TEST CONDITIONS
MIN
TYP
MAX
0
UNIT
%
Minimum Duty Cycle
Total Standby Current
Start-up Current
Operating Supply Current
Vcc Zener Voltage
note 2:These parameters, although guaranteed ,are not 100% tested in production.
note 3:Parameters measured at trip point of latch with Vpin 2=0.
note 4:Gain defined as:
Vpin 1
Vpin 3
note 5:Adjust Vcc above the start threshold before setting at 15V.
OPEN-LOOP LABORATORY TEST FIXTURE
I
ST
0.12
11
34
0.3
17
mA
mA
V
I
CC(opr)
Vz
Vpin 2=Vpin 3=0V
Icc=25mA
A=
; 0<=Vpin3<=0.8V
1
2
8
7
3
6
4
5
A
Vref
Vcc
1k
/ 1W
0
μ
F
CT
RT
1
5k
4
4
0
μ
F
Error Amp
Adjust
I
A
OUTPUT
High peak current associated with capacity loads necessitate careful grounding techniques. Timing and bypass
capacitors should be connected close to pin 5 in single point GND. The transistor and 5k
potentio-meter are used
to sample the oscillator waveform and apply an adjustable Ramp to Pin 3.
UNDER-VOLTAGE LOCKOUT
7
Vcc
Von=16V
Voff=10V
ON/OFF Command
to rest of IC
Von
Voff
<1mA
<15mA
Icc
Vcc
During Under-Voltage Lockout, the output driver is biased to a high impedance state. Pin 6 should be shunt to
GND with a bleeder resistor to prevent activating the power switch with output leakage currents.
相關PDF資料 |
PDF描述 |
|---|---|
| UTCUC3843A | CURRENT MODE PWM CONTROL CIRCUITS |
| UTCUC723 | ADJUSTABLE VOLTAGE REGULATOR |
| UTCULN2003 | SEVEN DARLINGTON ARRAYS |
| UTCUM66TXXL | MELODY INTEGRATED CIRCUIT |
| UTCUR132 | 2-WIRE FIELD PROGRAMMABLE W/TIN PLATING |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UTCUC3843A | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:CURRENT MODE PWM CONTROL CIRCUITS |
| UTCUC723 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:ADJUSTABLE VOLTAGE REGULATOR |
| UTCULN2003 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:SEVEN DARLINGTON ARRAYS |
| UTCUM66TXXL | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:MELODY INTEGRATED CIRCUIT |
| UTCUR0033 | 制造商:UTC-IC 制造商全稱:UTC-IC 功能描述:LINEAR INTEGRATED CIRCUIT |
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