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參數(shù)資料
| 型號： | IP3845 |
| 廠商： | SEMELAB LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
| 中文描述： | 0.2 A SWITCHING REGULATOR, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 58K |
| 代理商： | IP3845 |
LAB
SEME
IP1844 SERIES
IP1845 SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 2/95
DESCRIPTION
The IP1844 and IP1845 series of switching regulator control circuits contain all the functions necessary to
implement off-line, current mode switching regulators, using a minimum number of external parts.
Functions included are voltage reference, error amplifier, current sense comparator, oscillator, totem-pole output
driver and under-voltage lockout circuitry. In addition there is a toggle flip-flop which blanks the output on every
second clock pulse, thereby ensuring that the duty cycle never exceeds 50%.
Although pin compatible with the UC1844 and UC1845 series, SEMELAB has incorporated several improvements
in the IP1844 and IP1845 series allowing tighter and more complete specification of electrical performance .
BLOCK DIAGRAM
Values in brackets are for IP1845 series.
3.6V
ERROR
AMP
OSCILLATOR
2R
R
1V
R
S
PWM
LATCH
CURRENT
SENSE
COMPARATOR
16V
(8.4V)
6V
(0.5V)
2.5V
UNDER–VOLTAGE
LOCKOUT
ENABLE
REFERENCE
REGULATOR
5V
INTERNAL
BIAS
34V
REG
R
S
V STATUS
LATCH
T
Q
TOGGLE
FLIP
FLOP
PIN NUMBERS
1st Number
2nd Number
– N, J and 8 Pin D Packages
– 14 Pin D Package.
C
OMP
G
ND
V
CC
I
SENSE
V
FB
/C
R
T
T
OUTPUT
POWER
GROUND
V
REF
V
C
3/5
5/9
7/12
2/3
1/1
4/7
6/10
7/11
5/8
8/14
V
CC
I
O
Supply Voltage
Output Current
Analog Inputs
Error Amp Output Sink Current
(pins 2 and 3)
IP1844 , IP1845
IP2844 , IP2845
IP3844 , IP3845
Operating Ambient Temperature Range
≤
30V
0 to ±200mA
–0.3V to 3V
0 to 2mA
–55 to 125°C
–25 to 85°C
0 to 70°C
RECOMMENDED OPERATING CONDITIONS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IP1845 | RES,TF,634,1.0%,100P |
| IP2844 | CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
| IP2845 | CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
| IP1M10 | 200mA DUAL H-BRIDGE |
| IP1M12 | 200mA DUAL H-BRIDGE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IP3845A | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:CURRENT MODE REGULATING PULSE WIDTH MODULATORS |
| IP3845AD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| IP3845AD14 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| IP3845AD-14 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| IP3845AD-8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
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