When PIN-1 and PIN-2 are connected, the device operates in the force PWM (FPWM)
mode. In FPWM, the inductor current will be in CCM regardless of load. The switching
frequency is the same at light loads as that of heavier loads. The switching frequency will
be programmed by RT resistors (R6, R16) on the board, which is 500 kHz.
If synchronization to an external clock is desired, leave the MODE_x jumper open and
connect the clock input between SYNC_x test points (R13, R27) and a GND test point. The
device will operate in FPWM when it is synchronized to an external clock.
SYNC_A (TP13)
SYNC_B (TP27)
Test point to monitor the SYNC/MODE pin and external clock input
The SYNC_x test point can used to monitor the SYNC/MODE pin voltage on the device. It
is also the external clock input if synchronization is needed. Connect the external clock
input to the SYNC_x test point with the MODE_x jumper open on all pins. The external
clock frequency must be between 350 kHz and 2.2 MHz if used. The device operates in
FPWM when synchronized to a clock.
VCC_A (TP6)
VCC_B (TP20)
Test point to monitor the VCC pin
This test point is to monitor the voltage at the VCC output.
Detailed Descriptions
SNVU744 – OCTOBER 2020
TPS7H4010EVM User's Guide
9
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