CS1630/31

DS954F2

31

7

654

32

10

CLAMP1

CLAMP0

T2COMP

-

-

-

VALLEYSW

-

Number

Name

Description

[7:6]

CLAMP[1:0]

Configures the offset adjustment for the minimum measurable peak current

level on the second stage sense resistor when the gate drive is turned on.

CLAMP[1:0] is an unsigned integer in the range of 0

value3. The voltage on

the FBSENSE pin that corresponds to the minimum peak current is calculated

using the following formula:

[5]

T2COMP

Configures T2 measurement compensation for second stage flyback designs

with a large delay between the fall of the primary current and the rise of the

secondary current during the switching cycle. When using this feature, the

measured T2 time (measured from the falling edge of the gate drive) is

adjusted to obtain the actual T2 time, allowing the control loop to tightly regu-

late the output currents and reduce errors.

0 = Disable T2 measurement compensation

1 = Enable T2 measurement compensation

[4:2]

-

Reserved

[1]

VALLEYSW

Configures quasi-resonant switching (valley switching) on the second stage.

0 = Disables valley switching on the second stage

1 = Enables valley switching on the second stage

[0]

-

Reserved

1.4

IPEAK[2:0] 1

+

 16



 15

+



CLAMP[1:0] 8







–

8



+

512

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