LCS7260C datasheet(9/35 Pages) POWERINT

9 / 35 page

Rev. D 11/22

HiperLCS-2

www.power.com

Secondary Device PS Pin Error Fault Codes

Bit

Hex

Code

Fault

Action

PS Pin Error Fault Name

Description

31:28

1111

Fixed Pre-amble.

27:24

0000

Fixed Pre-amble.

23:18

xxxxxx

17:16

FREQ_MODE_INFO

Information only: read-out of the Secondary device internal Frequency

Range 0-3 value. Helpful for debugging frequency confirmation faults

(FREQ_FAULT), reported on the primary device.

15:14

2000h

BPS UV FLT

BPS undervoltage fault. This causes the secondary controller to stop

operating and enter power-up state.

1000h

800h

SEC_FB_OV_FLT

FB pin overvoltage fault. Note: this fault is only active after hand over to

secondary control.

400h

200h

8:7

40h

SEC_OT_FAULT

Secondary controller over-temperature fault. Device switching stops while

fault is active.

20h

SEC_PHINV_FAULT

Phase inversion fault is only active after start-up and hand over to secondary

control mode. The V

IS clock is compared to the internal FL clock. If the two

clocks are out of phase during 800 ms fault timer, the fault is asserted.

Cumulative switching cycles with phase inversion are required. A single

switching cycle without phase inversion resets the fault timer.

4:3

VOUT_UV_FLT

Output UV Fault become active after start-up and hand over to secondary

mode. Fault is activated if FB pin remains below V

FBBSTN(TH) for 64 ms. This

fault is disabled in CC mode (PPsel6, PPsel7).

VFB_START_FLT

Secondary start-up fault. From end of frequency confirmation (before hand

over), secondary output voltage (monitored by FB pin), if output does not

reach regulation within 64 ms, the fault is activated. This fault is disabled in

CC mode (PPsel6, PPsel7).

Fault Action:

A = auto-restart, P = power-up reset state, I = information only, N = not-used (ignore).

Table 4.

LSR2000C – Secondary-Side PS Pin Error Fault Reporting.

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