SI3460-XYY-GM datasheet(10/22 Pages) SILABS

Numer części	SI3460-XYY-GM

Szczegółowy opis	IEEE 802.3af PSE INTERFACE AND DC-DC CONTROLLER

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Si3460

10

Preliminary Rev. 0.4

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.

Table 7. DC-DC Performance1

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

DC-DC Controller Performance Characteristics2

PWM operating frequency

fPWM

250

kHz

Efficiency

η

VIN to VOUT

75

%

Load regulation

RLOAD

Minimum to maximum load

±1

%

Line regulation

RLINE

For VIN ranging from 11 to 16 V

±1

%

Output ripple

R

250 kHz PWM frequency

< 500 Hz

100

200

mV

Notes:

1. Typical specifications are based on an ambient operating temperature of 25 ºC and VIN =+12 V.

2. See “4. Si3460-EVB Performance Characteristics” for more details.

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