J1-1
IN
1/7
TB1-4
COM
OUT
Measure
Voltage
V
J2-1
OPEN
Sweep
GND
TB1-2
Current
0 to 600 mA
TPL7407L
TPL7407LEVM Performance Testing Using Lab Equipment
www.ti.com
Free-wheeling Diode Parameter VF channel 1 Test Setup and Typical Results
Board setup: Sweep output current on J2-1. Set Relay supply voltage to 0V. On standard boards the X
axis (output current) will need to be compensated for coil current flow. The real diode current is
approximately X-VF/2,880
Ω
. Measure output current on J2-1 (Kelvin connections at J2-1 and relay supply
are highly recommended for accurate results).
Figure 11. VF Schematic
14
TPL7407L7-Channel Relay and Inductive Load Sink Driver EVM
SLRU005 – February 2013
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