BC3770 datasheet(11/45 Pages) FREESCALE

Teilenummer	BC3770

Bauteilbeschribung	2.0 A Switch-Mode Charger

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Hersteller	FREESCALE [Freescale Semiconductor, Inc]

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Analog Integrated Circuit Device Data



11

Freescale Semiconductor

BC3770

Deglitch Timer (12) (CONTINUED)

tVSYSOK_DEB

VSYSOK Deglitch Time

• Duration VSYS stays above 3.6 V to set the VSYSOK interrupt

bit = 1 and pull the INTB pin Low in

VBUSOK = ENCOMPARATOR = 1

—

27

—

ms

tVSYSNG_DEB

VSYSNG Deglitch Time

• Duration VSYS stays at/below the VVSYS_MIN_OLP threshold to

set the VSYSNG interrupt bit = 1 and pull the INTB pin Low in

Discharge mode and ENCOMPARATOR = 1

—

27

—

ms

tVSYSOLP_DEB

VSYSOLP Deglitch Time

• Duration VSYS stays at/below the VVSYS_MIN_OLP threshold to

set the VSYSOLP interrupt bit = 1 and pull the INTB pin Low in

Overload mode and VBUSOK = 1

—

27

—

ms

Boost Converter

IS_OTG

Boost Supply Current

• In OTG enabled with no load

—

3.0

—

mA

Output Regulation Voltage Range

• Programmable at PMID

5.0

—

5.2

V

ILIM_OTG

Cycle-by-Cycle Current Limit

—

2.4

—

A

VBO_REG

Boost Output Regulation Voltage at VBUS

•3.0 V

VBATREG  4.45 V, set to 5.1 V at PMID, 0 mA  ILOAD 

900 mA

4.75

5.0

5.25

V

(13), (14)

IBO_MAX

Maximum Continuous Output Current at VBUS

•3.0 V

VBATREG  4.45 V

0.9

—

A

(13)

VBAT_MAX_BO

Battery Operation Voltage Range

• For the regulated output

3.0

—

4.45

V

(13)

VSTART_BO

BATREG Start Threshold Voltage for Boost

•VBATREG rising

—

2.9

—

V

VSTOP_BO

BATREG Stop Threshold Voltage for Boost

•VBATREG falling

—

2.5

—

V

VBUS_OVP_H

Overvoltage Protection at VBUS

• VBUS rising, 400 mV Hysteresis

—

5.4

—

V

INTB

Output Low Voltage

•ISINK = 5.0 mA

—

0.4

V

Logic Inputs (CHGENB, SHDNB, and NOBAT)

VIH

Logic Input High Voltage

1.2

—

V

VIL

Logic Input Low Voltage

—

0.4

V

RPD

Pull-down Resistance to GND

• On CHGENB & SHDNB pin

—

300

—

k



RPU

Pull-up Resistance to VL

• On NOBAT pin

—

300

—

k



Notes

13.

Guaranteed by design, characterization, and correlation with process controls. Not fully tested in production.

14.

The regulation in boost is only guaranteed in the operation range.

Table 4. BC3770 Electrical Characteristics (continued)

Characteristics noted under conditions: VVBUS = 5.0 V, VBATREG = 3.7 V, VVIO = 1.8 V, CVBUS = CPMID = 2.2 F, CVSYS = 10 F,

CCHGOUT = 4.7 F, CVL = 1.0 F, L = 1.0 H, TA = - 40 °C to 85 °C *). Typical values are at TA = 25°C, unless otherwise noted. (6)

Symbol

Characteristic

Min

Typ

Max

Unit

Notes

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