ncp3121 ON Semiconductor, ncp3121 Datasheet - Page 33

• Manufacturer Part Number: ncp3121
• Description: Dual 3.0 A, Step-down Dc/dc Switching Regulator
• Manufacturer: ON Semiconductor

Parallel Operation
advantages. One of the most important aspects is the
capability to deliver a double output current. The major
advantage is a reduced output voltage ripple in case of
out-of-phase synchronization. The standard configuration
is shown in Figure 58.
Parallel operation of NCP3121 circuit(s) has several
Disable
Enable
R_TRACK
EN
RT
PG1
PG2
EN1
SEQ1
EN2
SEQ2
TRACK1
TRACK2
AVIN
Figure 64. Parallel Operation Configuration.
GND
C3
NCP3121
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C13
R13
R23
C23
GND
C22
NCP3121
C12
33
GND
OLM in Parallel Operation
output to 6 A), the output voltage decreases. When OLM
wears off, the output current must be decreased below 3.5 A.
Then, the output voltage is released and current can be
increased again - up to 4 A.
When OLM is detected (e.g., a jump from 4 A on the
SW1
SW2
VIN
VIN
VIN
VIN
VIN
VIN
GND
C1
D11
D21
GND
GND
GND
L21
L11
VIN
GND
C2
R12
R11
GND
GND
C11
OUT