FAN7527BMX Datasheet, PDF (2/12 Pages) Fairchild Semiconductor – FAN7527B Power Factor Correction Controller

FAN7527B
Internal Block Diagram
Vcc 8
Idet 5
CS 4
MULT 3
2.5V Ref
Vcc
+
UVLO
−
Internal
Bias
11.5V 8.5V
7.2V
2V 1.5V
40k
8pF
+
−
Zero Current
Detector
+
−
Current Sense
Comparator
1.8V
Vmo
Vm1
0 ~ 3.8V
Multiplier
K=
Vmo
Vm1⋅ (Vm2 − Vref)
Timer R
S
Drive
Output
7 OUT
Q
Static OVP
R
Vref
Veao(L)=2.25V
+
2.25V
−
0.25V
−+
+
Vref
Vm2 Vref~Vref+2.5V
OVP _Isovp=30uA
Current
Detector
Idovp=40uA
−
Vea(-)
Error Amp
1 ^INV
6
GND
2
EA_OUT
2