UCS1002-3 datasheet(33/114 Pages) MICROCHIP

부품명	UCS1002-3

상세설명	Programmable USB Port Power Controller with Charger Emulation

PDF	114 Pages

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DS20006852A-page 33

UCS1002-3

area representing the USB 2.0 specified VBUS range

is now restricted to an upper current limit of IBUS_R2MIN.

Note that the UCS1002-3 will heat up along each load

line as voltage decreases. If the internal temperature

exceeds the TREG or TTSD thresholds, the port power

switch will open. Also note that when the VBUS voltage

is brought low enough (below VBUS_MIN), the port

power switch will open.

FIGURE 7-2:

Constant Current Limiting (Variable Slope) Operation.

0.5

1.0

1.5

2.0

2.5

5.25

4.75

0.9

1.2

1.0

0.9

0.5

1.5

IBUS_R2MIN

1.8

2.0

2.5

IBUS (Amps)

ILIM (Amps)

= ILIM’s

Constant

resistance IBUS

operation line 1

(ILIM = 0.5 A)

Constant resistance

IBUS operation line 5

(ILIM = 1.5 A*)

CC Mode - Power switch current increases as

voltage decreases when ILIM is exceeded

following constant resistance lines

*1.5 A limit reduced by -3.5% internally

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