ZL8802ALAFT datasheet(40/91 Pages) RENESAS

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ZL8802

FN8760 Rev.3.00

Page 40 of 91

Nov 8, 2017

OT_FAULT_LIMIT (4Fh)

Definition: Sets the temperature at which the device should indicate an over-temperature fault.

Paged or Global: Paged

Data Length in Bytes: 2

Data Format: Linear-11

Type: R/W

Protectable: Yes

Default Value: EBE8h (+125°C)

Units: Celsius

Equation: OT_FAULT_LIMIT = Y×2N

Range: 0 to 175°C

OT_FAULT_RESPONSE (50h)

Definition: Instructs the device on what action to take in response to an over-temperature fault. The retry time is the time between

restart attempts.

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Data Length in Bytes: 1

Data Format: Bit Field

Type: R/W

Protectable: Yes

Default Value: BFh (Continuous retries, retry delay 280ms)

Units: Retry time unit = 35ms

COMMAND

OT_FAULT_LIMIT (4Fh)

Format

Linear-11

Bit Position

321

Access

R/W

Function

Signed Exponent, N

Signed Mantissa, Y

Default Value

011

100

COMMAND

OT_FAULT_RESPONSE (50h)

Format

Bit Field

Bit Position

4321

Access

R/WR/W

Function

See Following Table

Default Value

1111

BIT

FIELD NAME

VALUE

DESCRIPTION

7:6

Response behavior, the device:

•Pulls SALRT low

• Sets the related fault bit in the

status registers. Fault bits are

only cleared by the

CLEAR_FAULTS command.

00-01

Not used

Disable and Retry according to the setting in Bits [5:3].

Output is disabled while the fault is present. Operation resumes and the output is enabled when

the temperature falls below the OT_WARN_LIMIT.

5:3

Retry Setting

000

No retry. The output remains disabled until the fault is cleared.

001-110 Not used

111

Attempts to restart continuously, until it is commanded OFF (by the ENABLE pin or OPERATION

command or both), bias power is removed, or another fault condition causes the unit to shut

down. A retry is attempted after the temperature falls below the OT_WARN_LIMIT. The time

between the start of each attempt to restart is set by the value in Bits [2:0] multiplied by 35ms.

2:0

Retry Delay

000-111

Retry delay time = (Value +1)*35ms. Sets the time between retries in 35ms increments. Range

is 35ms to 280ms.

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