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MAX1667EAP+;MAX1667EAP+T;中文规格书,Datasheet资料

General Description

The MAX1667 provides the power control necessary to charge batteries of any chemistry. All charging functions are controlled through the Intel System Management Bus (SMBus?) interface. The SMBus 2-wire serial interface sets the charge voltage and current and provides thermal status information. The MAX1667 functions as a Level 2charger, compliant with the Duracell/Intel Smart Battery Charger Specification.

In addition to the feature set required for a Level 2 charg-er, the MAX1667 generates interrupts to signal the host when power is applied to the charger or when a battery is installed or removed. Additional status bits allow the host to check whether the charger has enough input voltage,and whether the voltage on or current into the battery is being regulated. This allows the host to determine when lithium-ion (Li+) batteries have completed the charge with-out interrogating the battery.

The MAX1667 is available in a 20-pin SSOP with a 2mm profile height.

________________________Applications

Notebook Computers Charger Base Stations Personal Digital Assistants

Phones

____________________________Features

o Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.o SMBus 2-Wire Serial Interface

o Compliant with Duracell/Intel Smart Battery Charger Specification Rev. 1.0o 4A, 3A, or 1A (max) Battery Charge Current o 5-Bit Control of Charge Current o Up to 18.4V Battery Voltage o 11-Bit Control of Voltage o ±1% Voltage Accuracy o Up to +28V Input Voltage

o Battery Thermistor Fail-Safe Protection o Greater than 95% Efficiency o Synchronous Rectifier

MAX1667

Chemistry-Independent,

Level 2 Smart Battery Charger

________________________________________________________________Maxim Integrated Products

Typical Operating Circuit

SMBus is a trademark of Intel Corp.

19-1488; Rev 1; 5/03

Pin Configuration appears at end of data sheet.

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at https://www.wendangku.net/doc/591477869.html,.

M A X 1667

Chemistry-Independent,

Level 2 Smart Battery Charger 2_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V DCIN = 18V, internal reference, 1μF capacitor at REF, 1μF capacitor at VL, T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C, unless otherwise noted.)

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.

DCIN to AGND .......................................................-0.3V to +30V BST to AGND..........................................................-0.3V to +36V BST, DHI to LX..........................................................-0.3V to +6V LX, IOUT to AGND..................................................-0.3V to +30V THM, CCI, CCV, DACV, REF,

DLO to AGND.............................................-0.3V to (VL + 0.3V)VL, SEL, INT , SDA, SCL to AGND............................-0.3V to +6V BATT, CS+ to AGND..............................................-0.3V to +20V

PGND to AGND.....................................................-0.3V to +0.3V SDA, INT Current................................................................50mA VL Current...........................................................................50mA Continuous Power Dissipation (T A = +70°C)

SSOP (derate 8mW/°C above +70°C)..........................640mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-60°C to +150°C Lead Temperature (soldering, 10s).................................+300°C

MAX1667

Chemistry-Independent,

Level 2 Smart Battery Charger

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V DCIN = 18V, internal reference, 1μF capacitor at REF, 1μF capacitor at VL, T A = 0°C to +85°C , unless otherwise noted. Typical values

Note 1:When DCIN is less than 4V, VL is less than 3.2V, causing the battery current to be typically 2μA (CS plus BATT input

current).

M A X 1667

Chemistry-Independent,

Level 2 Smart Battery Charger 4_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

(V DCIN = 18V, internal reference, 1μF capacitor at REF, 1μF capacitor at VL, T A = -40°C to +85°C ,unless otherwise noted.Typical values are at T A = +25°C. Limits over this temperature range are guaranteed by design.)

MAX1667

Chemistry-Independent,

Level 2 Smart Battery Charger

_______________________________________________________________________________________5

TIMING CHARACTERISTICS (Figures 1 and 2)

(T A = 0°C to +85°C , unless otherwise noted.)

TIMING CHARACTERISTICS (Figures 1 and 2)

= -40°C to +85°C , unless otherwise noted. Limits over this temperature range are guaranteed by design.)

M A X 1667

Chemistry-Independent,

Level 2 Smart Battery Charger 6_______________________________________________________________________________________

Figure 2. SMBus Serial-Interface Timing—Acknowledge

Figure 1. SMBus Serial-Interface Timing—Address

MAX1667

Chemistry-Independent,

Level 2 Smart Battery Charger

_______________________________________________________________________________________7

5.20

5.30

5.25

5.40

5.355.45

5.50

105

152025

VL LOAD REGULATION

LOAD CURRENT (mA)

V L (V )

5.35

5.385.375.365.405.395.445.435.42

5.415.45-40

-20

100

VL vs. TEMPERATURE

TEMPERATURE (°C)

V L (V ) 4.06

4.10

4.074.08

4.09

4.11

00.80.60.20.4 1.0 1.2 1.4 1.6 1.8 2.0

V REF LOAD REGULATION

M A X 1667 T O C 06

LOAD CURRENT (mA)

V R E F (V )

5.350

5.375

5.400

5.425

5.450VL LINE REGULATION

V DCIN (V)

V L (V )

155

5V/div

10V LOAD TRANSIENT

(WITH CHANGE IN REGULATION LOOP)

MAX1667TOC02

V DCIN = 18V

ChargingVoltage() = 12,000mV ChargingCurrent() = 1500mA

1ms/div

V BATT

CCI

CCI CCI

50mV/div

500mA/div

CCV CCV

CCV I LOAD

AVERAGED MEASUREMENT 5V/div

10V LOAD TRANSIENT

(VOLTAGE REGULATION WITH CURRENT LIMIT)

V DCIN = 18V

ChargingVoltage() = 12,000mV ChargingCurrent() = 1500mA

500μs/div

200mV/div

1.4V

1A 1A/div

__________________________________________Typical Operating Characteristics

(Circuit of Figure 7, T A = +25°C, unless otherwise noted.)

M A X 1667

Chemistry-Independent,

Level 2 Smart Battery Charger 8_______________________________________________________________________________________

-1.0

-0.6-0.8-0.2-0.40.200.40.80.61.00

4k 6k 8k 2k 10k 12k 14k 18k 16k 20k

BATT VOLTAGE ERROR vs. ChargingVoltage() CODE

ChargingVoltage() CODE

B A T T V O L T A G E E R R O R (%)

-5

1000200030005001500250035004000

LOAD CURRENT ERROR

CODE

B A T T

C U R R E N T E R R O R (%)

Typical Operating Characteristics (continued)

(Circuit of Figure 7, T A = +25°C, unless otherwise noted.)

100

0.01

1.0

0.1

0.001

OUTPUT V-I CHARACTERISTIC (SWITCHING REGULATOR)

LOAD CURRENT (mA)

D R O P I N B A T T O U T P U T V O L T A G

E (%)

0513

OUTPUT V-I CHARACTERISTIC

(LINEAR SOURCE)

V IOUT (V)

I I O U T (m A

)

2674.080

4.1004.085

4.0904.0954.110-40

-20

100

V REF vs. TEMPERATURE

TEMPERATURE (°C)

V R E F (V )

4.10550705560651000

2000

1000

3000

4000

EFFICIENCY vs. LOAD CURRENT

(VOLTAGE REGULATION)

LOAD CURRENT (mA)

E F F I C I E N C Y (%)

758085909550

7055

6065100

EFFICIENCY vs. BATT VOLTAGE (CURRENT REGULATION)

BATT VOLTAGE (V)

E F F I C I E N C Y (%)

758085909514

MAX1667

Chemistry-Independent,

Level 2 Smart Battery Charger

_______________________________________________________________________________________9

Pin Description

M A X 1667

Chemistry-Independent,

Level 2 Smart Battery Charger Smart Battery Charging System

A smart battery charging system, at a minimum, con-sists of a smart battery and smart battery charger com-patible with the Smart Battery System specifications using Intel’s system management bus (SMBus).

Smart Battery System Block Diagrams

A system may use one or more smart batteries. The block diagram of a smart battery charging system shown in Figure 3 depicts a single battery system. This is typically found in notebook computers, video cam-eras, cellular phones, and other portable electronic equipment.

Another possibility is a system that uses two or more smart batteries. A block diagram for a system featuring multiple batteries is shown in Figure 4. The smart bat-tery selector is used to connect batteries to either the smart battery charger or the system, or to disconnect them, as appropriate. For a standard smart battery, the following connections must be made: power (the bat-tery’s positive and negative terminals), SMBus (clock and data), and safety signal (resistance, typically tem-perature dependent). Additionally, the system host must be able to query any battery in the system so it can display the state of all batteries present in the sys-tem.

Figure 4 shows a two-battery system where Battery 2 is being charged while Battery 1 is powering the system.This configuration may be used to “condition” Battery 1, allowing it to be fully discharged prior to recharge.

Smart Battery Charger Types

Two types of smart battery chargers are defined: Level 2 and Level 3. All smart battery chargers communicate with the smart battery using the SMBus; the two types differ in their SMBus communication mode and in whether they modify the charging algorithm of the smart battery as shown in Table 1. Level 3 smart bat-tery chargers are supersets of Level 2 chargers and as such support all Level 2 charger commands.

Figure 3. Typical Single Smart Battery System

______________________________________________________________________________________

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MAX1667EAP+MAX1667EAP+T