Ic Data Sheets - Philips 20PHH4109/88 Service Manual

EN 48 8. TPN14.1E LA

8. IC Data Sheets

This chapter shows the internal block diagrams and pin
configurations of ICs that are drawn as "black boxes" in the
electrical diagrams (with the exception of "memory" and "logic"
ICs).
8.1 Diagram 10-3-1 Power, B01, RT7234GSP (IC U701)
Block diagram
EN
SS
FB
VS*
Pinning information
VREG5
2014-Feb-21
IC Data Sheets
VCC* VREG5
POR &
Reg
Off-Time
VBIAS
V
REF
OC Control
UV & OV
SW
V
REG5
Ripple
Gen.
2µA
+
-
FB
-
V
IN
Comparator
On-Time
EN
FB 2
3
SS
4
Figure 8-1 Internal block diagram and pin configuration
BOOT
RT7234
Min.
VREG5
Driver
ZC
Comparator
-
FB
+
0.9 x V
REF
RT7234
8
7
PGND
6
9
5
back to
div. table
VIN
110mΩ
SW
30mΩ
PGND
GND*
PGOOD*
VIN
BOOT
SW
PGND
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