aic1761 Analog Devices, Inc., aic1761 Datasheet

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aic1761

Manufacturer Part Number
aic1761
Description
Battery Charge Controller
Manufacturer
Analog Devices, Inc.
Datasheet
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
Battery Chargers for :
F EATUR E S
APPLICATIONS
Reliable Fast Charge Control of NiMH/NiCd Bat-
teries.
Quick and Easy Testing for Production.
Fast Charge Termination by:
Adjustable Fast Charge Safety Timer.
Protection against Temperature Fault.
Protection against Short-Circuited and Open Bat-
teries.
Wide Operation Voltage Range: 9V to 18V, no Ex-
tra Regulator Needed.
Large Battery Voltage Detection Range: 0.65V to
3.7V.
LED Drivers to Indicate Charge Status or Fault
Conditions.
Voltage Reference Output.
Space-Saving Packages:
8-PIN DIP, SO
14-PIN DIP, SO
Mobile Phones
Notebook and Laptop Personal Computers
Portable Power Tools and Toys
Portable Communication Equipments
Portable Video and Stereo Equipments
1. Accurate - V Detection Level with Respect to
2. Peak Voltage Timer (0 V).
Peak Battery Voltage Value.
AIC1761 ................……………........ -1%
AIC1766 ............…………..……...... -0.25%
TEL: (8863)577-2500 FAX:(8863)577-2510
www.analog.com.tw
DESCRIPTION
The AIC1761/1766 fast charge controller IC is
designed for intelligent charging of NiMH or NiCd
batteries without overcharging. It detects a voltage
drop (- V) occurring in the final stage of a fast
charging cycle and correspondingly controls the
charging current. Fast charge can also be cut off
by a peak voltage timer (0 V).
The detection of - V is a very reliable method to
terminate fast charging for NiMH and NiCd batter-
ies. The AIC1761/1766 uses - V detection as one
of primary decisions for fast charge cut-off. The -
cell,
- V value for the AIC1766 is as small as 4mV per
cell, particularly suitable for NiMH as well as the
NiCd batteries. The peak voltage timer is particu-
larly useful when the voltage drop at the end of
charge for some batteries, e.g. NiMH cells, is not
pronounced enough for reliable detection. An ad-
justable safety timer (3 settings) is used as a back-
up termination method. Provisions are made with
the AIC1761/1766 to prevent fast charge under
temperature fault conditions. Two LED outputs are
used to indicate the charging status. Another flash
LED output can be used alone to indicate charge
status.
AC mode allows the battery to drive its loads while
being charged. Test mode is provided to dramati-
cally reduce production test time.
V value for the AIC1761 is as small as 16mV per
BATTERY CHARGE CONTROLLER
suitable
for
AIC1761/1766
NiCd
SPEC NO: DS-1761-02
batteries.
1
The

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aic1761 Summary of contents

Page 1

... V). The detection very reliable method to terminate fast charging for NiMH and NiCd batter- ies. The AIC1761/1766 uses - V detection as one of primary decisions for fast charge cut-off. The - V value for the AIC1761 is as small as 16mV per cell, suitable for NiCd ...

Page 2

... AIC1761-CN14 AIC1766-CN14 (PLASTIC DIP) AIC1761-CS14 AIC1766-CS14 (PLASTIC SO) ..............................................…………….............................. 18V ...............................……………......... 20mA ...........................................…………........................ www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 R8 470 + ZD1 C7 9.1V 100 F BATTERY CELLS ...

Page 3

... Fast Charge R LED Trickle Charge Fast Charge R VOUT Trickle Charge Fast Charge R FLASH Trickle Charge F FLASH D FLASH V REF I REF Under-Temperature NTCL Over-Temperature NTCH www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 SPEC NO: DS-1761- VDD + 0 VOUT 1.5K R6 LED 1.5K R7 FLASH 1.5K R8 MODE MIN. TYP. MAX 1.5 -1 -0.25 ...

Page 4

... TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 SPEC NO: DS-1761-02 Output Resistance of LED pin vs Power Supply Voltage (Trickle Charge Mode (V) DD Output Resistance of VOUT pin vs Temperature (Fast Charge Cycle Temperature ( C) V Reference Voltage vs Temperature ...

Page 5

... Reset Regulator CHARGE CONTROL STATE MACHINE 13-Bit Timing Mode ADC Control Select MODE TIMER www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 (CONTINUED) V (Low) Limit vs Temperature Temperature ( C) LED FLASH (for 14 pin version) VOUT Oscillator 80 ...

Page 6

... VOUT PIN - Output, for LED indicator. FLASH PIN - Output, for LED indicator. VNTC PIN - Input, for temperature protection. The AIC1761/1766 is a battery fast charge con- troller IC that utilizes the following methods to terminate the fast charge process for NiMH or NiCd battery cells: The principle of operation of the AIC1761/1766 is described in the following section ...

Page 7

... V decline of VBT is detected. NO Initial Timer 1.5 min. YES 3.0 min. V goes to high, fast charge finished, and trickle charge start. OUT 3.0 min. Fig. 2 Operation Chart of the AIC1761/1766 www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 SPEC NO: DS-1761-02 Power ON V goes high for OUT trickle charge, If safety timer and 0.65V< ...

Page 8

... AIC1761/1766 display outputs, i.e., VOUT pin stays OFF while LED pin stays ON. (B) TEST Mode (MODE pin biased unique feature of the AIC1761/1766 is that it can be put into a TEST mode by pulling the MODE pin allowing verification tests for ...

Page 9

... VBT Pin 2.8V VOUT Pin ON LED OFF Pin FLASH Pin ON 0.5S 0.4S 1.5S TIME Section 2.972V for the AIC1761 ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. AC VBT - V Test Mode Set Up (min. 3.75S) VDD/2 GND 3V 2.995V OFF ON 4.27Hz 1.5S 20mS 0.4S 4.7S 4 ...

Page 10

... R : Thermistor resistance at high temperature T2 limit. BATTERY VOLTAGE DIVIDER To ensure proper operation of the AIC1761/1766, selection of resistor values for battery voltage di- vider must meet the following two crucial require- ments: 1. When the battery pack is disconnected from the charge circuitry, the voltage of VBT pin must be higher than 4 ...

Page 11

... Charge Time (min.) Fig. 5 Charge Characteristics of NiMH Battery Both Fig. 5 and Fig. 6 were obtained by using the AIC1766. Results of similar experiments by using the AIC1761 are shown in Fig. 7 and Fig.8. ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. 1.7 1.6 1.5 1 ...

Page 12

... LED2 RED GREEN R9 R10 VREF VBT VDD GND 0 VOUT 1N4148 TIMER 5 4 LED MODE AIC1761/66 C8 0.1 F R14 VDD 390K MODE TIMER LED2 VREF GREEN R18 AIC1766 LED VNTC R16 VOUT VBT 150K GND + C7 C6 R15 4.7 F 0.1 F 150K 6 ...

Page 13

... F 100 120K VBT VREF + R11 VDD GND C3 22K VOUT TIMER 4 LED MODE 120K AIC1761/1766 R15 sets Trickle Charge Current IT Q6 9014 1.5K 1.5K + 0.1 F R14 R12 C6 C5 100 F VREF VDD 9014 VOUT Q5 10K LED R13 AIC1761/1766 1.5K 1.5K R13 R12 1.5K 1.5K R14 R13 13 ...

Page 14

... Buzzer will be activated when LED pin goes low. Buzzer Circuit for Trickle Mode www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 R26 6V 6.8K 5V 5.1K 4V 3.9K 3V 2.7K VDD TIMER MODE AIC1761/1766 VOUT VREF LED VBT GND VDD MODE TIMER AIC1761/1766 VOUT VREF LED VBT GND 14 ...

Page 15

... LEAD PLASTIC DIP 9.3 0.3 6.2 0.2 3.3 0.1 0.6 0.3 3.2 0.3 0.5 0.1 2.54 0.10 14 LEAD PLASTIC DIP 19.0 0.5 6.2 0.2 1.5 0.5 3.3 0.1 0.6 0.3 3.2 0.1 0.5 0.1 2.54 0.10 ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. BATTERY CHARGE CONTROLLER 8 LEAD PLASTIC SO 4.80 0.20 8.0 0.5 1.27 0.10 2.5 0.1 10max 8.5 1.0 14 LEAD PLASTIC SO 8.6 0.2 8.0 0.5 0.25 0.1 10 max. 8.5 1.0 0.45 0.05 UNIT: mm www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1761/1766 SPEC NO: DS-1761-02 0.015X45 1.5 0.2 0.45 0.10 8 max. 1.27 0.10 0.38 45 1.50.2 0.25 0.10 8 max. 15 ...

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