1.2V - THOMSON 50M14DP Service Manual

3.17 5V‐1.2V
U7: The IC is G153.It's function is just like TPS54519.It can set work frequency by
PIN8.And it has a power good signal output. Now this IC is used in V101 and MT31.
Vout=0.827*{1+R136/(R138+R137)}
On‐off frequency setting relationship (Relation between the resistance of PIN8 and
frequency)
RT(KΩ)=311890/(Fsw(KHz)1.0793
(Fsw(KHz)=133870/RT(KΩ)0.9393
L102 is the test
point of 5V‐1.2V.
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