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參數(shù)資料
| 型號(hào)： | ML4811 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | High Frequency PWM Controller(高頻PWM控制器) |
| 中文描述： | 高頻PWM控制器（高頻脈寬調(diào)制控制器） |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 196K |
| 代理商： | ML4811 |
ML4810, ML4811
2
REV. 1.0 10/10/2000
PIN CONFIGURATION
ML4810
16-Pin DIP (P16)
16-Pin SOIC (S16W)
PIN NAME
FUNCTION
PIN NAME
FUNCTION
1
INV
Inverting input to error amp.
2
NI
Non-inverting input to error amp.
3
E/A OUT
Output of error amplifier and input to
main comparator.
4
RC
RESET
Timing elements for Integrating Soft
Start reset.
5
CLOCK
Oscillator output.
6
R
T
Timing resistor for oscillator — sets
charging current for oscillator timing
capacitor (pin 6).
7
C
T
Timing capacitor for oscillator.
8
RAMP
Non-inverting input to main
comparator. Connected to C
T
for
voltage mode operation or to current
sense resistor for current mode.
9
SOFT START Normally connected to Soft Start
capacitor.
10
SYNC
A high going pulse terminates the
PWM cycle and discharges C
T
.
PIN DESCRIPTION
11
OVP
Exceeding 2.5V terminates the PWM
cycle and inhibits the outputs.
12
I
LIM
/S.D.
Current limit sense pin. Normally
connected to current sense resistor.
13
GND
Analog signal ground.
14
OUTA
High current totem pole output. This
output is the first one energized after
power on reset.
15
PWR GND
Return for the high current totem
pole outputs.
16
V
C
Positive supply for the high current
totem pole outputs.
17
OUTB
High current totem pole output.
18
V
CC
Positive supply for the IC.
19
5.1V REF
Buffered output for the 5.1V voltage
reference.
20
RESET DELAY Timing capacitor to determine the
amount of delay between fault.
TOP VIEW
INV
NI
E/A OUT
RC
RESET
R
T
C
T
RAMP
SOFT START
5.1V REF
V
CC
OUTB
POWER V
C
PWR GND
OUTA
GND
I
LIM
/S.D.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ML4811
20-Pin DIP (P20)
20-Pin SOIC (S20)
INV
NI
E/A OUT
RC
RESET
CLOCK
R
T
C
T
RAMP
SOFT START
SYNC
RESET DELAY
5.1V REF
V
CC
OUTB
POWER V
C
PWR GND
OUTA
GND
I
LIM
/S.D.
OVP
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TOP VIEW
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