SI3460 Silicon Laboratories, SI3460 Datasheet - Page 10

• Manufacturer Part Number: SI3460
• Description: IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER
• Manufacturer: Silicon Laboratories

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Si3460
4.2. DC-DC Converter Performance Characteristics
The dc-dc converter utilizes a digital control loop architecture operating at 250 kHz. The complete converter is
comprised of the Si3460 controller and the external components in the Si3460-EVB schematics. The performance
specifications in Table 7 are typical for the Si3460-EVB reference design.
10
DC-DC Controller Performance Characteristics
PWM operating frequency
Efficiency
Load regulation
Line regulation
Output ripple
Notes:
1. Typical specifications are based on an ambient operating temperature of 25 ºC and V
2. See “4. Si3460-EVB Performance Characteristics” for more details.
Parameter
Symbol
R
R
f
PWM
LOAD
LINE
R
η
Table 7. DC-DC Performance
Preliminary Rev. 0.4
For V
2
Minimum to maximum load
250 kHz PWM frequency
IN
ranging from 11 to 16 V
Conditions
V
< 500 Hz
IN
to V
OUT
1
IN
Min
= +12 V.
Typ
250
100
200
75
±1
±1
Max
Unit
kHz
mV
%
%
%
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