Datasheet

ADP1877HC-EVALZ
Rev. A | Page 5 of 12
EVALUATION BOARD OPERATING INSTRUCTIONS
1. Connect Jumper J3 (EN1) to the HI position to enable
Channel 1 of the ADP1877.
2. Connect Jumper J2 (EN2) to the HI position to enable
Channel 2 of the ADP1877.
3. Connect Jumper J4 (FREQ) to the HI position for 600 kHz
operation.
4. Connect Jumper J1 (SYNC) to the HI position for PWM
operation or to LO for PSM operation.
5. Connect the positive terminal of the input power supply to
the input terminal, T1. The input range is 6 V to 14 V.
Table 1. Jumper Description
Jumper Description Function
J1 SYNC Connect to HI for PWM or LO for PSM operation. For synchronization, run an external clock source to this pin.
J2 EN2 Connect to HI to enable Channel 2 of the ADP1877, or to LO to disable the channel.
J3 EN1 Connect to HI to enable Channel 1 of the ADP1877, or to LO to disable the channel.
J4 FREQ Connect to LO for 300 kHz or to HI for 600 kHz operation. For this 13 A evaluation board, connect J4 to HI.
Table 2. Performance Summary (T
A
= 25°C)
Parameter Condition
V
IN
6 V to 14 V
f
SW
Switching frequency, 600 kHz
V
OUT1
1.8 V
I
OUT1
0 A to 13 A
V
OUT1
Ripple, DC Load 20 mV at 13 A load
V
OUT1
Deviation Upon Step Load Release 2% with a 11 A step load; 3% with a 13 A step load
V
OUT2
1.05 V
I
OUT2
0 A to 13 A
V
OUT2
Ripple, DC Load 13 mV at 13 A load
V
OUT2
Deviation Upon Step Load Release 3% with a 5 A step load