LT8584_15 datasheet(4/36 Pages) LINER

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LT8584

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Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device reliability

and lifetime.

Note 2: Do not apply a positive or negative voltage or current source to

RTMR, otherwise permanent damage may occur.

Note 3: ABSMAX rating refers to the maximum DC + AC leakage spike. Do

not exceed 40VDC on any of the SW pins.

Note 4: The LT8584E is guaranteed to meet performance specifications

from 0°C to 125°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization, and correlation with statistical process controls. The

LT8584I is guaranteed over the full –40°C to 125°C operating junction

temperature range. The LT8584H is guaranteed over the full –40°C to

150°C operating junction temperature range.

Note 5: This is a measure of time duration from the onset of the switch

turning on to the time the short-circuit protection circuit is disabled. If the

current comparator trips during this duration, the switch error latch is set.

This indicates that the connection to the transformer primary is most likely

shorted.

Note 6: This is a measure of time duration for the switch clamp to operate

continuously without setting the switch error latch. If the switch clamp

remains engaged longer than the switch clamp blanking time, the switch

error latch is set and switching is disabled.

Note 7: The voltage proportional to temperature (VTEMP) is measured

on the OUT pin while in analog multiplexer MODE 3 or 4. VTEMP must be

subtracted from the VCELL voltage that is measured while in analog mux

MODE 1. Both measurements should be taken within 100ms of each other

to reduce errors in absolute temperature calculation.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Decode Window Duration

RRTMR = 10kΩ

RRTMR = 50kΩ

RRTMR = 100kΩ

RRTMR = 200kΩ

1.76

15.6

29.3

1.86

8.4

16.4

31.5

1.96

8.8

17.2

33.7

Decode Window Range

1.76

33.7

tRST

DIN Serial Communication Reset Time

µs

RTMR Start-Up Time

RRTMR = 10kΩ

1.8

µs

DIN Hold-Off Time

µs

DIN High Time

µs

DIN Low Time

µs

Discharger Activation Time

RRTMR = 10kΩ

900

Discharger Deactivation Time

2.1

µs

DIN Slew Rate

V/ms

TiMing characTerisTics The

denotes the specifications which apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. MODE = 0V. Refer to Timing Diagram for parameter definition. (Note 4)

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V, DIN = GND unless otherwise noted. (Note 4)

elecTrical characTerisTics

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Handshake Voltage Line Regulation

From VVIN = 2.5V to VVIN = 4.2V

0.2

0.75

%/V

VTEMP Temperature Coefficient (TC)

Note 7, °K = (VCELL – VTEMP)/TC

mV/°K

VTEMP

VTEMP = VIN – VOUT, TJ = 25°C

0.658

OUT Pin Clamp Voltage

10mA Sourced from Pin

1.53

1.6

OUT Pin Amplifier Load Regulation

IOUT = 10µA to 1mA

0.2

0.4

%/mA

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