UCS1002-3 datasheet(9/114 Pages) MICROCHIP

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DS20006852A-page 9

UCS1002-3

Latched Mode Cycle Time

tUL

—

From PWR_EN edge transition

from inactive to active to begin

error recovery.

Auto-Recovery Mode

Cycle Time

tCYCLE

—

Time delay before error

condition check.

Programmable 10-25 ms,

default listed.

Auto-Recovery Delay

tRST

—

Portable device attached,

VBUS must be

 VTEST after

this time.

Programmable 10-25 ms,

default listed.

Discharge Time

tDISCHARGE

—

200

—

Amount of time discharge

resistor applied.

Programmable 100-400 ms,

default listed.

Port Power Switch Operation With Trip Mode Current Limiting

Region 2 Current Keep-Out

IBUS_R2MIN

——

0.1

Minimum VBUS allowed at

Output

VBUS_MIN

2.0

—

Port Power Switch Operation with Constant Current Limiting (Variable Slope)

Region 2 Current Keep-Out

IBUS_R2MIN

——

1.5

Minimum VBUS Allowed at

Output

VBUS_MIN

2.0

—

Port Power Switch Operation with Custom Current Limiting

Region 2 Current Keep-Out

IBUS_R2MIN

—

0.1

Programmable from 100 mA to

1.8 A. Default value listed.

Minimum VBUS Allowed at

Output

VBUS_MIN

2.0

—

Programmable from 1.5V to

2.25V. Default value listed.

Current Measurement

Current Measurement – DC Parameters

Current Measurement Range

IBUS_M

6.4

—

2500

Range 0-255 LSB

(see Note 2)

Reported Current

Measurement Resolution

DIBUS_M

—

9.76

—

1 LSB

Current Measurement

Accuracy

—

±2

—

ILIM not exceeded

Current Measurement – AC Parameter

Sampling Rate

—

500

—

µs

Charge Rationing

Charge Rationing – DC Parameters

Accumulated Current

Measurement Accuracy

——

±4.5

—

Charge Rationing – AC Parameter

TABLE 1-2:

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Characteristics: Unless otherwise specified, VDD = 4.5V to 5.5V, VS = 2.9V to 5.5V, VPULLUP = 3V to 5.5V,

TA = -40°C to +85°C; all Typical values at VDD = VS = 5V, TA = +27°C.

Parameter

Sym.

Min.

Typ.

Max.

Unit

Conditions

Note 1: For split supply systems using the Attach Detection feature, VS must not exceed VDD + 150 mV.

2: The current measurement full-scale range maximum value is 2.5A. However, the UCS1002-3 cannot

report values above ILIM (if IBUS_R2MIN  ILIM) or above IBUS_R2MIN (if IBUS_R2MIN > ILIM and ILIM 1.5A).

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