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參數(shù)資料
| 型號(hào)： | IP3845AD-14 |
| 英文描述： | Current-Mode SMPS Controller |
| 中文描述： | 電流模式開關(guān)電源控制器 |
| 文件頁(yè)數(shù)： | 2/6頁(yè) |
| 文件大小： | 72K |
| 代理商： | IP3845AD-14 |
LAB
SEME
IP1844A SERIES
IP1845A SERIES
Semelab plc.
Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 2/95
V
CC
I
O
Supply Voltage
1
Output Current
Analog Inputs
Error Amp Output Sink Current
(pins 2 and 3)
IP1844A , IP1845A
IP2844A , IP2845A
IP3844A , IP3845A
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
Notes:
1.
Lower limit set by under voltage lockout specification.
RECOMMENDED OPERATING CONDITIONS
* 1844A and 1845A series only.
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
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
TOGGLE
FLIP
FLOP *
T
Q
DESCRIPTION
The IP1844A/IP1845A 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 the IP1844A and IP1845A series of devices have a toggle flip-flop which blanks the output on every
second clock pulse, thereby ensuring that the duty cycle never exceeds 50%. For applications requiring more
flexible control, all devices feature an on-chip trimmed oscillator discharge current, allowing accurate control to
maximum-duty-cycle by selection of timing components. This can be beneficial even when using the IP1844A or
IP1845A series, as it allows optimum safety margins to be designed into the application.
Although pin compatible with the standard IP1844/5 parts these devices offer improved performance in several
areas. They also offer tighter specification and improved performance over the IP and UC1844/5 series, whilst
retaining complete compatibility.
BLOCK DIAGRAM
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| IP3845AD-8 | Current-Mode SMPS Controller |
| IP3845AJ | Current-Mode SMPS Controller |
| IP2844AD-14 | Current-Mode SMPS Controller |
| IP2844AD-8 | Current-Mode SMPS Controller |
| IP2844AJ | Current-Mode SMPS Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| IP3845AJ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| IP3845AN | 制造商:SEME-LAB 制造商全稱:Seme LAB 功能描述:Current Mode Regulating Pulse Width Modulator |
| IP3845D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| IP3845D14 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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