- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359170 > ML4826IP-1 PFC and Dual Output PWM Controller Combo PDF資料下載
參數(shù)資料
| 型號： | ML4826IP-1 |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | PFC and Dual Output PWM Controller Combo |
| 中文描述： | PFC和雙輸出PWM控制器組合 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 296K |
| 代理商： | ML4826IP-1 |
June 1997
ML4826
*
PFC and Dual Output PWM Controller Combo
1
GENERAL DESCRIPTION
The ML4826 is a high power controller for power factor
corrected, switched mode power supplies. PFC allows the
use of smaller, lower cost bulk capacitors, reduces power
line loading and stress on the switching FETs, and results
in a power supply that fully complies with IEC1000-3-2
specifications. The ML4826 includes circuits for the
implementation of a leading edge, average current “boost”
type power factor correction and a trailing edge, pulse
width modulator (PWM) with dual totem-pole outputs.
The device is available in two versions; the ML4826-1
(f
PWM
= f
PFC
) and the ML4826-2 (f
PWM
= 2 x f
PFC
).
Doubling the switching frequency of the PWM allows the
user to design with smaller output components while
maintaining the optimum operating frequency for the PFC.
An over-voltage comparator shuts down the PFC section in
the event of a sudden decrease in load. The PFC section
also includes peak current limiting and input voltage
brown-out protection. The PWM section can be operated
in current or voltage mode at up to 250kHz and includes a
duty cycle limit to prevent transformer saturation.
FEATURES
I
Internally synchronized PFC and PWM in one IC
I
Low total harmonic distortion
I
Reduced ripple current in the storage capacitor
between the PFC and PWM sections
I
Average current, continuous boost, leading edge PFC
I
High efficiency trailing edge PWM with dual
totem-pole outputs
I
Average line voltage compensation with brown-out
control
I
PFC overvoltage comparator eliminates output
“runaway” due to load removal
I
Current-fed multiplier for improved noise immunity
I
Overvoltage protection, UVLO, and soft start
BLOCK DIAGRAM
* This Part Is End Of Life As Of August 1, 2000
VCC2
19
VEAO
IEAO
VFB
IAC
VRMS
ISENSE
RTCT
OSCILLATOR
OVP
+
PFC ILIMIT
UVLO
VREF
PULSE WIDTH MODULATOR
POWER FACTOR CORRECTOR
2.5V
-
-
+
20
2
4
3
7.5V
REFERENCE
18
VCC
17
VCCZ
VEA
7
-
+
IEA
1
+
-
+
-
PFC OUT
15
S
R
Q
Q
S
R
Q
Q
2.7V
-1V
RAMP 2
9
PWM 1
13
S
R
Q
Q
VDC
6
SS
5
DC ILIMIT
10
VCC
DUTY CYCLE
LIMIT
-
+
1V
-
+
2.5V
VFB
-
+
8V
8V
VIN OK
GAIN
MODULATOR
VCCZ
x 2
(-2 VERSION ONLY)
3.5k
3.5k
1.5V
50μA
-
+
13.5V
DC ILIMIT
RAMP 1
8
PWM 2
14
S
T
Q
Q
VCC2
PGND
16
PGND
12
AGND
11
8V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4826IP-2 | PFC and Dual Output PWM Controller Combo |
| ML4826CP2 | PFC and Dual Output PWM Controller Combo |
| ML4826 | PFC and Dual Output PWM Controller Combo |
| ML4827CP-1 | Fault-Protected PFC and PWM Controller Combo |
| ML4827CP-2 | Fault-Protected PFC and PWM Controller Combo |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4826IP2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ML4826IP-2 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:PFC and Dual Output PWM Controller Combo |
| ML4826IS-1 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:PFC and Dual Output PWM Controller Combo |
| ML4826IS-2 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:PFC and Dual Output PWM Controller Combo |
| ML4827 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Fault-Protected PFC and PWM Controller Combo |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。