MAX8900B(2010) Просмотр технического описания (PDF) - Maxim Integrated

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производитель

MAX8900B
(Rev.:2010)

1.2A Switch-Mode Li+ Chargers with ±22V Input Rating and JEITA Battery Temperature Monitoring

Maxim Integrated 

1.2A Switch-Mode Li+ Chargers with ±22V Input

Rating and JEITA Battery Temperature Monitoring

Absolute Maximum Ratings

IN to PGND.............................................................-22V to +22V

INBP to PGND........................................... (VBAT - 0.3V) to +22V

IN to INBP..............................................................-30V to +1.2V

STAT1, STAT2 to GND...........................................-0.3V to +30V

BST to PGND.........................................................-0.3V to +36V

BST to LX..............................................................-0.3V to +6.0V

BST to PVL.............................................................-0.3V to +30V

PVL, BAT, CS to PGND.........................................-0.3V to +6.0V

AVL, STAT3, CEN, THM to GND..........................-0.3V to +6.0V

PVL to AVL............................................................-0.3V to +0.3V

CT to GND.................................................-0.3V to (AVL + 0.3V)

SETI, DNI to GND.................................... -0.3V to (VBAT + 0.3V)

PGND to GND.......................................................-0.3V to +0.3V

IN Continuous Current................................................... 2.4ARMS

LX Continuous Current (Note 1).................................... 1.6ARMS

CS Continuous Current................................................. 1.3ARMS

BAT Continuous Current................................................ 1.3ARMS

Continuous Power Dissipation (TA = +70NC)

30-Bump WLP (derate 20.4mW/NC above +70NC)....1616mW

Operating Temperature Range........................... -40NC to +85NC

Junction Temperature....................................... -40NC to +150NC

Storage Temperature Range............................ -65NC to +150NC

Soldering Temperture (reflow).........................................+260NC

Note 1: LX has an internal clamp diode to PGND and INBP. Applications that forward bias these diodes should take care not to

exceed the power dissipation limits of the device.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

Electrical Characteristics

(VIN = 6V, VBAT = 4V, RSETI = 2.87kI, RDNI = 3.57kI, VTHM = VAVL/2, circuit of Figure 1, TA = -40NC to +85NC, unless otherwise

noted. Typical values are at TA = +25NC.) (Note 2)

PARAMETER

GENERAL

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

Withstand voltage

-20

+20

V

IN Input Voltage Range (Note 3)

VIN

MAX8900B

Operating voltage

3.4

MAX8900A

3.4

8.7

V

6.3

IN Undervoltage Threshold

IN to BAT Shutdown Threshold

VUVLO

VIN2BAT

VIN falling, 400mV hysteresis (Note 4)

When charging stops, VIN falling, 200mV

hysteresis

3.1

3.2

3.3

V

0

15

30

mV

IN Overvoltage Threshold

(Note 3)

0.40V hysteresis (MAX8900B) 8.80 9.00 9.20

VOVLO VIN rising 0.26V hysteresis (MAX8900A)

6.35

6.50

6.65

V

IN Supply Current

LX High-Side Resistance

LX Low-Side Resistance

LX Leakage Current

BST Leakage Current

Current-Sense Resistor

IN to BAT Dropout Resistance

Switching Frequency

IIN

RHS

RLS

RSNS

RIN2BAT

fSW

Charger enabled, no switching

Charger enabled, f = 3.25MHz, VIN = 6V

Charger disabled, CEN = high

LX = GND or IN

TA = +25NC

TA = +85NC

VBST - VLX = 6V

TA = +25NC

TA = +85NC

VBAT = 2.6V

Calculation estimates a 40mI inductor

resistance (RL), RIN2BAT = RIN2INBP + RHS

+ RL + RSNS

VBAT = 2.6V

1

2

20

0.04 0.2

0.10

0.15

0.01

10

0.1

0.01

10

0.1

0.045

0.3

3.25

mA

I

I

FA

FA

I

I

MHz

4

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