Block Diagram; Ssb: Power-1 - Philips PICO 19HFL3232D/10 Service Manual

EN 28 8. TPM5.2E LA
8.2 Diagram B01 SSB:

Block diagram

0.95V
FB
0.3V
SS
0.8V
COMP
EN
1.3 V
Pinning information
2010-Jun-25
IC Data Sheets
Power-1, MP9403 (IC U701)
+
OVP
--
OSCILLATOR
+
340KHz
--
--
+
ERROR
+
AMPLIFIER
6υA
--
+
SHUTDOWN
COMPARATOR
TOP VIEW
BS 1
IN 2
SW 3
GND 4
CONNECT EXPOSED PAD
AND GND PIN TO A CERTAIN
GROUND PLANE
Figure 8-4 Internal block diagram and pin configuration
RAMP
CLK
S
+
R
CURRENT
--
COMPARATOR
1.2V
8 SS
7 EN
6 COMP
5 FB
CURRENT
SENSE
AMPLIFIER
+
5V
--
Q
Q
OVP
IN < 3.95V
IN
INTERNAL
REGULATORS
18840_303_100406.eps
IN
BS
SW
GND
100406