Datasheet

www.ti.com
4.3 Disable Jumper (JP1)
Placing the JP1 shunt in the Left Position
Dis En
JP 1
drives the Q1 FET to pull the TPS40193 EN pin low,
disabling the controller. Removing the JP1 shunt or installing it in the Right Position
Dis En
JP 1
shorts the Q1
4.4 Test Point Descriptions
4.4.1 Input Voltage Monitoring (TP1, TP2)
General Configuration and Description
The TPS40193EVM-001 provides a three-pin, 100mil (0.100in) header and shunt for testing the
TPS40193 disable function.
gate to ground and enables the TPS40193EVM-001 output.
Table 4 describes the TPS40196EVM-001 test points and identifies the respective sections of this user
guide that discuss each test point.
Table 4. Test Point Descriptions
Test Point Label Use/Function Section
TP1 V
IN+
Monitor input voltage to the module
Section 4.4.1
TP2 V
IN–
Monitor input voltage to the module
TP3 Power-Good Power-Good output voltage
TP4 Ext Source External source for Power-Good circuit
Section 4.4.2
Ground for external source for
TP5 GND
Power-Good
Section 4.4.3 ,
TP6 COMP Monitor COMP voltage
Section 4.4.5
Ground for SW, LDRV and HDRV
TP7 GND
measurements
TP8 HDRV Monitor high-side gate drive (Q2)
Section 4.4.4
TP9 SW Monitor switch node waveforms
TP10 LDRV Monitor low-side gate drive (Q3)
TP11 GND Ground for Loop Monitoring Probe
Loop injection point and injection
TP12 CH1
monitoring point
Section 4.4.5
Loop injection point and output
TP13 CH2
response monitoring point
TP14 GND Ground for Loop Monitoring Probe
TP15 V
OUT+
Monitor output voltage from the module
Section 4.4.6
TP16 V
OUT–
Monitor output voltage from the module
Injection point to test pre-bias load
TP17 Pre-Bias Section 4.4.7
compliance
The TPS40193EVM-001 provides two test points for measuring the voltage applied to the module. These
test points allow the user to measure the actual module voltage without losses from input cables and
connector losses. All input voltage measurements should be made between TP1 and TP2. To use TP1
and TP2, connect a voltmeter positive terminal to TP1 and negative terminal to TP2.
Using the TPS40193EVM-001 6 SLUU274 – May 2007
Submit Documentation Feedback