MAXIM MAX8804W, MAX8804Y, MAX8804Z Technical data

General Description

The MAX8804W/MAX8804Y/MAX8804Z intelligent, dual-input, stand-alone, constant-current, constant-voltage (CCCV), thermally regulated linear chargers are designed for a single-cell lithium-ion (Li+) battery. They integrate the current-sense circuit, MOS pass element, thermal-regulation circuitry, and overvoltage protection (OVP), and eliminate the reverse-blocking Schottky diode to create a simple and small charging solution for handheld equipment.

The MAX8804W/MAX8804Z function as stand-alone chargers to control the charging sequence from the prequalification state through fast-charge, top-off charge, and full-charge indication. The MAX8804Y eliminates the prequalification state to allow startup into a load without a battery. Proprietary thermal-regulation circuitry limits the die temperature when fast-charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.

The MAX8804Y/MAX8804Z achieve high flexibility by providing an adjustable DC/USB fast-charge current through a simple single-wire interface (SET input). The chargers automatically select between either a USB or AC adapter input source. The AC adapter charge current is programmable from 400mA to 700mA in 50mA steps through a serial interface. The USB charge current is programmable to 95mA, 380mA, or 475mA through the same interface. Other features include an active-low battery charging-status indicator (CHG), an active-low power-OK indicator (POK), an active-low USB input detection output (USBPWR) on the MAX8804Y/MAX8804Z, and battery pack detection (DETBAT) on the MAX8804W.

The MAX8804W/MAX8804Y/MAX8804Z accept a 4.15V to 30V DC source voltage or a 4.15V to 16V USB input voltage, but disable charging when either input voltage exceeds 7.5V to protect against unqualified or faulty input sources. The MAX8804W/MAX8804Y/MAX8804Z operate over the extended temperature range (-40°C to +85°C) and are available in a tiny 8-pin thermally enhanced 2mm x 3mm TDFN package.

Applications

Cell Phones/Smartphones

Digital Cameras

Portable Media Players

MP3 Players

Other Handheld Devices

Features

♦ Complete Chargers for Single-Cell Li+ Battery ♦ Dual-Input, 30V AC Adapter/16V USB ♦ No External FET, Blocking Diode, or Sense

Resistor Required

♦ Automatic USB/AC Adapter Input Selection ♦ Easy Programmable Fast-Charge Current and

Top-Off Threshold

♦ Proprietary Die Temperature Regulation Control ♦ ±5% Fast-Charge Current-Limit Accuracy ♦ Battery Pack Detection Input (MAX8804W) ♦ Power-Present and Charger-Status Outputs ♦ No Prequalification Charge (MAX8804Y) ♦ Tiny 2mm x 3mm Thermally Enhanced TDFN

Package

♦ USB Charging Protected by US Patent #6,507,172

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

________________________________________________________________

Maxim Integrated Products

19-0785; Rev 1; 10/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Ordering Information

EP = Exposed paddle.

Denotes a lead-free package.

Note: All devices are specified to operate over the -40°C to +85°C operating temperature range.

Pin Configuration appears at end of data sheet.

GND

USB

SET

CHG

POK

BAT

+3.3V

ADAPTER

USB

PORT

ENABLE/DISABLE

AND PROGRAMMING

Li+

1μF

2.2μF

MAX8804W

MAX8804Y MAX8804Z

1μF

(DETBAT)

NOTE: () FOR MAX8804W, <> FOR MAX8804Y/MAX8804Z

Typical Application Circuit

PART

MAX8804WETA+ 8 TDFN-EP* T823+1 AAP

MAX8804YETA+ 8 TDFN-EP* T823+1 AAD

MAX8804ZETA+ 8 TDFN-EP* T823+1 AAC

PINPACKAGE

PKG

CODE

TOP

MARK

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

((VDC= 5V, V

SET

= 0V) or (V

USB

= 5V, V

SET

= 5V), V

BAT

= unconnected, V

DETBAT

= 0V (MAX8804W), TA= -40°C to +85°C, unless

otherwise noted.) (Note 1)

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.

DC to GND .............................................................-0.3V to +30V

USB to GND ...........................................................-0.3V to +16V

BAT, CHG, SET, POK, USBPWR, DETBAT

to GND...............................................................-0.3V to +5.5V

Continuous Power Dissipation (T

= +70°C) 8-Pin TDFN 2mm x 3mm (derate 16.7mW/°C above +70°C)

(multilayer board) .......................................................1333mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

DC AND USB

DC Input Voltage Range 028V

USB Input Voltage Range 014V

Input Operating Range (Notes 2, 3) 4.15 7.00 V

Input Undervoltage Threshold VIN rising, 500mV hysteresis (typ) (Note 2) 3.85 4.0 4.15 V

Input Overvoltage Threshold VIN rising, 200mV hysteresis (typ) (Note 2) 7.2 7.5 7.8 V

USB Input Supply Current

DC to BAT On-Resistance VDC = 3.7V, V

USB to BAT On-Resistance V

Input to BAT Comparator Threshold (Note 2)

BAT

BAT Regulation Voltage I

Battery Removal Detection Threshold

PARAMETER CONDITIONS MIN TYP MAX UNITS

VDC = 0V, V

VIN rising 145 260 385

BAT

Hysteresis 0.1

= 0V, I

USB

SET

= V

SET

USB

falling 55

= 0mA

BAT

= 5V, standby mode 300 550DC Input Supply Current

= 4.3V, shutdown mode 300 550

BAT

SET

= 0V, standby mode 300 550

= V

= 4.3V, shutdown mode 300 550

BAT

= 3.7V, V

rising 4.40 4.67 4.90

= 0mA, charge mode 800 1200

= 5V, I

BAT

= 3.6V 0.55 1.0 Ω

BAT

= 3.6V 0.65 1.2 Ω

BAT

TA = +25°C 4.179 4.200 4.221

= 0mA, charge mode 800 1200

= -40°C to +85°C 4.158 4.200 4.242

µA

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

((VDC= 5V, V

SET

= 0V) or (V

USB

= 5V, V

SET

= 5V), V

BAT

= unconnected, V

DETBAT

= 0V (MAX8804W), TA= -40°C to +85°C, unless

otherwise noted.) (Note 1)

DC Charging Current

USB Charging Current

Soft-Start Time Ramping time from 0 to 500mA 250 µs

BAT Prequal Threshold

BAT Prequal Charge Current MAX8804W/MAX8804Z only 95 mA

BAT Leakage Current VDC = V

SET

Logic Input Thresholds

Logic-High Time Pulse width required to program DC charge current 1 1000 µs

Logic-Low Time Pulse width required to program USB charge current 1 1000 µs

SET DC Mode Shutdown Delay V

SET USB Mode Shutdown Delay VDC = 0V, V

SET Internal Pulldown Resistor 24MΩ

PARAMETER CONDITIONS MIN TYP MAX UNITS

V V rising edge detection on SET (MAX8804Y/ MAX8804Z)

V V edge detection on SET (MAX8804W)

V V edge detection on SET (MAX8804Y/ MAX8804Z)

V V edge detection on SET (MAX8804W)

MAX8804W/MAX8804Z only, V hysteresis (typ)

= 0V,

USB

= 3.6V,

BAT

= 0V,

USB

= 3.6V, rising

BAT

= 0V,

= 3.6V, rising

BAT

= 0V,

= 3.6V, rising

BAT

= 0V, V

USB

rising 1.6

SET

falling 0.4

SET

= 0V, VDC = 5V, measured from V

USB

Default and 1st to 3rd interface pulse

4th to 7th interface pulse 523 550 578

8th to 11th interface pulse 570 600 630

12th to 15th interface pulse 428 450 473

16th to 19th interface pulse 380 400 420

20th to 23rd interface pulse 618 650 683

24th to 27th interface pulse 665 700 735

Default and 1st to 3rd interface pulse

4th to 7th interface pulse 523 550 578

8th to 11th interface pulse 475 500 525

12th to 15th interface pulse 380 400 420

16th to 19th interface pulse 570 600 630

20th to 23th interface pulse 618 650 683

24th to 27th interface pulse 665 700 735

Default 90 95 100

1st interface pulse 360 380 400

2nd interface pulse 450 475 500

Default 360 380 400

1st interface pulse 450 475 500

2nd interface pulse 90 95 100

rising, 300mV

BAT

= 4.2V 2 µA

BAT

SET

= 5V, measured from V

SET

475 500 525

428 450 473

2.35 2.50 2.65 V

low to high 1.5 2 2.5 ms

high to low 1.5 2 2.5 ms

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

((VDC= 5V, V

SET

= 0V) or (V

USB

= 5V, V

SET

= 5V), V

BAT

= unconnected, V

DETBAT

= 0V (MAX8804W), TA= -40°C to +85°C, unless

otherwise noted.) (Note 1)

Note 1: Devices are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design

and characterization.

Note 2: V

refers to the input for the IC. For the MAX8804W/MAX8804Y/MAX8804Z, VINis VDCwith V

USB

= 0V or V

USB

with VDC=

0V.

Note 3: Guaranteed by undervoltage and overvoltage threshold testing. For charge completion, the input voltage must be greater

than 4.28V.

Note 4: This hysteresis is for all charge current except 95mA. In the case of 95mA charge current, voltage-mode to current-mode

detection gives indication of charge mode.

POK, CHG, USBPWR (USBPWR only for MAX8804Y/MAX8804Z)

Logic Output-Voltage Low I

Logic Output-Current High

DETBAT (MAX8804W only)

Logic Input Theshold

Pullup Resistor 63 kΩ

CHG

PARAMETER CONDITIONS MIN TYP MAX UNITS

= I

POK

USBPWR

= V

= I

CHG

= 5.5V,

= 0V

USB

= 5mA 60 500 mV

USBPWR

TA = +25°C 0.001 1

= +85°C 0.01

Rising 1.6

Falling 0.4

VDC = 0V, V

= 5V 60 80 100

USB

Default, 4th, 8th, 12th, 16th, 20th, 24th, 28th interface

60 80 100

pulse

µA

1st, 5th, 9th, 13th, 17th, 21st, 25th interface pulse

67.5 90 112.5

CHG Top-Off Threshold

falling, battery is

BAT

charged, rising edge on SET

V V

USB

= 5V,

= 0V

2nd, 6th, 10th, 14th, 18th, 22nd,

75 100 125

26th interface pulse

3rd, 7th, 11th, 15th, 19th, 23rd, 27th

CHG Hysteresis

CHG Detection Delay I

rising after top-off

BAT

is detected (Note 4)

falls below top-off threshold 3 4 5 ms

BAT

DC mode 57

USB mode 51

interface pulse

52.7 70 87.5

THERMAL LOOP

Thermal-Regulation Set Point

Thermal-Regulation Gain

Junction temperature when the charge current is reduced, T

rising

DC charging -40

BAT

for

USB charging -24

Reduction of I increase of T

+105 °C

mA/°C

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

_______________________________________________________________________________________ 5

Typical Operating Characteristics

BAT

= 3.6V; DC charge mode: VDC= 5V, V

USB

= 0V, V

DETBAT

= 0V (only for MAX8804W), V

SET

= 0V or unconnected; USB charge

mode: V

USB

= 5V, VDC= 0V, V

SET

= 5V; TA= +25°C, unless otherwise noted.)

STANDBY-MODE SUPPLY CURRENT

vs. INPUT VOLTAGE (USB CHARGING MODE)

INPUT VOLTAGE (V)

SUPPLY CURRENT (mA)

MAX8804Y/Z toc04

0246810121416

0.2

0.4

0.6

0.8

CHARGE CURRENT vs. BATTERY VOLTAGE

(DC CHARGING MODE)

BATTERY VOLTAGE (V)

CHARGE CURRENT (mA)

MAX8804Y/Z toc05

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

100

200

300

400

500

600

CHARGE CURRENT vs. BATTERY VOLTAGE

(USB CHARGING MODE)

BATTERY VOLTAGE (V)

CHARGE CURRENT (mA)

MAX8804Y/Z toc06

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5

120

160

200

SUPPLY CURRENT vs. INPUT VOLTAGE

1.0

0.8

0.6

0.4

SUPPLY CURRENT (mA)

0.2

036912151821242730

DISABLED-MODE SUPPLY CURRENT

vs. INPUT VOLTAGE (DC CHARGING MODE)

0.8

0.6

(DC CHARGING MODE)

MAX8804Y/Z toc01

INPUT VOLTAGE (V)

MAX8804Y/Z toc03

SUPPLY CURRENT vs. INPUT VOLTAGE

1.0

0.8

0.6

0.4

SUPPLY CURRENT (mA)

0.2

(USB CHARGING MODE)

MAX8804Y/Z toc02

0246810121416

INPUT VOLTAGE (V)

SUPPLY CURRENT (mA)

0.4

0.2

0 5 10 15 20 25 30

INPUT VOLTAGE (V)

CHARGE CURRENT

vs. AMBIENT TEMPERATURE

AMBIENT TEMPERATURE (°C)

CHARGE CURRENT (mA)

MAX8804Y/Z toc13

-40 -15 10 35 60 85

200

300

400

500

600

700

DC CHARGE MODE 650mA

BATTERY REGULATION VOLTAGE

vs. LOAD CURRENT

LOAD CURRENT (mA)

BATTERY REGULATION VOLTAGE (V)

MAX8804Y/Z toc14

0 100 200 300 400 500 600 700

4.10

4.15

4.20

4.25

4.30

550mA CHARGE-CURRENT SETTING

BATTERY REGULATION VOLTAGE

vs. AMBIENT TEMPERATURE

AMBIENT TEMPERATURE (°C)

BATTERY REGULATION VOLTAGE (V)

MAX8804Y/Z toc12

-40 -15 10 35 60 85

4.180

4.186

4.192

4.198

4.204

4.210

USB MODE

DC MODE

MAX8804W/MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

6 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

BAT

= 3.6V; DC charge mode: VDC= 5V, V

USB

= 0V, V

DETBAT

= 0V (only for MAX8804W), V

SET

= 0V or unconnected; USB charge

mode: V

USB

= 5V, VDC= 0V, V

SET

= 5V; TA= +25°C, unless otherwise noted.)

CHARGE CURRENT

vs. DC INPUT VOLTAGE

600

120

CHARGE CURRENT

vs. USB INPUT VOLTAGE

CHARGE CURRENT vs. SET PULSE

(USB CHARGING MODE) (MAX8804Y/MAX8804Z)

MAX8804Y/Z toc09

500

400

300

200

CHARGE CURRENT (mA)

100

0 5 10 15 20 25 30

INPUT VOLTAGE (V)

CHARGE CURRENT vs. SET PULSE

(DC CHARGING MODE) (MAX8804Y/MAX8804Z)

SET

700mA

CHG

500mA

550mA

600mA

450mA

650mA

400mA

MAX8804Y/Z toc10

700mA

2ms/div

500mA

MAX8804Y/Z toc07

1V/div

200mA/div

CHARGE CURRENT (mA)

0246810121416

INPUT VOLTAGE (V)

CHARGE CURRENT

vs. INPUT VOLTAGE HEADROOM

600

INPUT VOLTAGE DECREASING

500

400

300

200

CHARGE CURRENT (mA)

100

0 100 200 300 400 500

INPUT VOLTAGE HEADROOM (mV)

DC MODE

USB MODE

MAX8804Y/Z toc08

CHG

MAX8804Y/Z toc11

SET

475mA

380mA 380mA

95mA 95mA

2ms/div

1V/div

475mA

200mA/div

95mA

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