Service manual

ML4800 PRODUCT SPECIFICATION
2 REV. 1.0.5 9/25/01
Pin Configuration
Pin Description
Pin Name Function
1 IEAO Slew rate enhanced PFC transconductance error amplifier output
2I
AC
PFC AC line reference input to Gain Modulator
3I
SENSE
Current sense input to the PFC Gain Modulator
4V
RMS
PFC Gain Modulator RMS line voltage compensation input
5 SS Connection point for the PWM soft start capacitor
6V
DC
PWM voltage feedback input
7 RAMP 1 Oscillator timing node; timing set by R
T
C
T
8 RAMP 2 When in current mode, this pin functions as the current sense input; when in voltage mode,
it is the PWM modulation ramp input.
9 DC I
LIMIT
PWM cycle-by-cycle current limit comparator input
10 GND Ground
11 PWM OUT PWM driver output
12 PFC OUT PFC driver output
13 V
CC
Positive supply
14 V
REF
Buffered output for the internal 7.5V reference
15 V
FB
PFC transconductance voltage error amplifier input
16 VEAO PFC transconductance voltage error amplifier output
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO
I
AC
I
SENSE
V
RMS
SS
V
DC
RAMP 1
RAMP 2
VEAO
V
FB
V
REF
V
CC
PFC OUT
PWM OUT
GND
DC I
LIMIT
TOP VIEW
ML4800
16-Pin PDIP (P16)
16-Pin Narrow SOIC (S16N)
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