ML4805IP Ver la hoja de datos (PDF) - Fairchild Semiconductor
Número de pieza
componentes Descripción
Fabricante
ML4805IP Datasheet PDF : 13 Pages
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ML4805
PIN CONFIGURATION
ML4805
18-Pin PDIP (P18)
18-Pin SOIC (S18)
IEAO 1
18 VEAO
IAC 2
ISENSE 3
VRMS 4
SS 5
17 VFB
16 VREF
15 VCC
14 PFC OUT
VDC 6
RTCT 7
RAMP 1 8
13 PWM OUT
12 PGND
11 AGND
RAMP 2 9
10 ILIM
TOP VIEW
PIN DESCRIPTION
PIN NAME
1 IEAO
2 IAC
3 ISENSE
4 VRMS
5 SS
6 VDC
7 RTCT
8 RAMP 1
FUNCTION
PFC transconductance current error
amplifier output
PFC gain control reference input
Current sense input to the PFC current
limit comparator
Input for PFC RMS line voltage
compensation
Connection point for the PWM soft start
capacitor
PWM voltage feedback input
Connection for oscillator frequency
setting components
PFC ramp input
PIN NAME
FUNCTION
9 RAMP 2 PWM ramp sense input
10 ILIM
PWM current limit sense input
11 AGND
Analog ground
12 PGND
Power ground
13 PWM OUT PWM driver output
14 PFC OUT PFC driver output
15 VCC
Positive supply (connected to an
internal shunt regulator).
16 VREF
Buffered output for the internal 7.5V
reference
17 VFB
PFC transconductance voltage error
amplifier input
18 VEAO
PFC transconductance voltage error
amplifier output
2
REV. 1.1 3/9/2001
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