BQ51221 datasheet(7/50 Pages) TI2

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7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

MIN

MAX

UNIT

VRECT

Voltage

RECT

IRECT

Current through

internal rectifier

RECT

1.5

IOUT

Output current

OUT

1.5

VAD

Adapter voltage

IAD-EN

Sink current

AD-EN

ICOMM

COMMx sink current

COMM1, COMM2

500

Junction temperature

125

°C

7.4 Thermal Information

THERMAL METRIC(1)

BQ51013B

UNIT

RHL (VQFN)

YFP (DSBGA)

20 PiNS

28 PINS

RθJA

Junction-to-ambient thermal resistance

37.7

58.9

°C/W

RθJC(top)

Junction-to-case (top) thermal resistance

35.5

0.2

°C/W

RθJB

Junction-to-board thermal resistance

13.6

9.1

°C/W

ψJT

Junction-to-top characterization parameter

0.5

1.4

°C/W

ψJB

Junction-to-board characterization parameter

13.5

8.9

°C/W

RθJC(bot)

Junction-to-case (bottom) thermal resistance

2.7

n/a

°C/W

(1)

For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

7.5 Electrical Characteristics

over operating free-air temperature range, –40°C to 125°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VUVLO

Undervoltage lockout

VRECT: 0 V → 3 V

2.5

2.7

2.8

VHYS-UVLO

Hysteresis on UVLO

VRECT: 3 V → 2 V

250

VRECT-OVP

Input overvoltage threshold

VRECT: 5 V → 16 V

14.5

15.5

VHYS-OVP

Hysteresis on OVP

VRECT: 16 V → 5 V

150

VRECT-Th1

Dynamic VRECT Threshold 1

ILOAD < 0.1 x IIMAX (ILOAD rising)

7.08

VRECT-Th2

Dynamic VRECT Threshold 2

0.1 x IIMAX < ILOAD < 0.2 x IIMAX

(ILOAD rising)

6.28

VRECT-Th3

Dynamic VRECT Threshold 3

0.2 x IIMAX < ILOAD < 0.4 x IIMAX

(ILOAD rising)

5.53

VRECT-Th4

Dynamic VRECT Threshold 4

ILOAD > 0.4 x IIMAX (ILOAD rising)

5.11

VRECT-Track

VRECT TRACKING

In current limit, voltage above

VOUT

VOUT+0.25

ILOAD

ILOAD Hysteresis for dynamic VRECT

thresholds as a % of IILIM

ILOAD falling

VRECT-DPM

Rectifier undervoltage protection, restricts

IOUT at VRECT-DPM

3.1

3.2

VRECT-REV

Rectifier reverse voltage protection at the

output

VRECT-REV = VOUT - VRECT,

VOUT = 10 V

QUIESCENT CURRENT

IRECT

Active chip quiescent current consumption

from RECT

ILOAD = 0 mA, 0°C ≤ TJ ≤ 85°C

www.ti.com

BQ51013B

SLUSB62D – MARCH 2013 – REVISED SEPTEMBER 2020

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