Datasheet

Test Setup

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5.3 List of Test Points

Table 2. Test Point Functions

TEST POINTS NAME DESCRIPTION

TP1 VIN Input voltage positive test point, for efficiency test

TP2 PGND Input voltage negative test point, for efficiency test

TP3 VDD Primary-side bias voltage

TP4 SW1 Primary-side switch node (intersection of Q1 and Q2)

TP5 VG3 Primary-side Q2 gate

TP6 VG2 Primary-side Q1 gate

TP7 PGND Primary-side power ground

TP8 VLINE Primary-side positive input voltage terminal after input filter

TP9 GND Primary-side signal ground

TP10 GND_S Secondary-side ground

TP11 Vo_rpl Output voltage ripple test point

TP12 F_SYNC Primary-side IC RT-pin (external frequency synchronization)

TP13 SRA Primary-side IC SRA-pin

TP14 OUTA Primary-side IC OUTA-pin

TP15 VD_S Secondary-side MOSFET drain pin (Q7 and Q8)

TP16 VG_S Secondary-side MOSFET gate pin (Q7 and Q8)

J1 INPUT Input voltage terminals

J2 Loop+ Feedback loop test point

J3 Loop- Feedback loop test point

J4 OUTPUT Output voltage terminals

Half-Bridge DC-to-DC Converter With Primary-Side Control SLUU429B–June 2010–Revised December 2010

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