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| AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 FEATURES Reliable Fast Charge Control of NiMH/NiCd Batteries. Quick and Easy Testing for Production. Fast Charge Termination by: 1. Accurate -V Detection Level with Respect to Peak Battery Voltage Value. AIC1761 ....................................... -1% AIC1766 ...................................... -0.25% 2. Peak Voltage Timer (0V). Adjustable Fast Charge Safety Timer. Protection against Temperature Fault. Protection against Short-Circuited and Open Batteries. Wide Operation Voltage Range: 9V to 18V, no Extra 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 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 (0V). The detection of -V is a very reliable method to terminate fast charging for NiMH and NiCd batteries. 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 batteries. The -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 particularly 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 adjustable safety timer (3 settings) is used as a backup 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 dramatically reduce production test time. APPLICATIONS Battery Chargers for : Mobile Phones Notebook and Laptop Personal Computers Portable Power Tools and Toys Portable Communication Equipments Portable Video and Stereo Equipments ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 1 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 TYPICAL APPLICATION CIRCUIT VIN 12 ~ 15 V C1 10F + R1 D1 1N4148 120 0.5W L1 220H + 1 8 7 6 5 *Fast Charge Current= (0.3/RS) A R4 51K C3 1F + D2 1N5819 C4 220F R2 1K D3 1N4148 R5 *RS 0.33 1W R3 100K R7 150K C6 0.1F D4 1N5819 1K BATTERY 3 ~ 5 CELLS R8 470 ZD1 9.1V + C7 100F LED1 RED R9 1K LED2 GREEN R10 1K SC BST IS VCC FB 2 SE 3 TC C2 470pF 4 GND AIC1563 1 VBT 2 GND 3 TIMER 4 MODE VREF VDD 8 7 + C5 4.7F VOUT 6 LED 5 AIC1761/66 Simple Battery Charger for NiMH / NiCd Battery ORDERING INFORMATION AIC176X-XXXX VERSION 08: 8 PIN VERSION 14: 14 PIN VERSION PACKAGE TYPE N: PLASTIC DIP S: SMALL OUTLINE TEMPERATURE RANGE C=0C~70C -V DETECTION LEVEL 1: -1% 6: -0.25% ORDER NUMBER AIC1761-CN08 AIC1766-CN08 (PLASTIC DIP) PIN CONFIGURATION TOP VIEW VBT GND TIMER 1 2 3 4 8 7 6 5 VREF VDD VOUT LED AIC1761-CS08 AIC1766-CS08 (PLASTIC SO) MODE AIC1761-CN14 AIC1766-CN14 (PLASTIC DIP) TOP VIEW GND TIMER MODE LED 1 2 3 4 5 6 7 14 GND 13 NC 12 VBT 11 NC 10 VREF 9 8 VNTC VDD AIC1761-CS14 AIC1766-CS14 (PLASTIC SO) VOUT NC FLASH ABSOLUTE MAXIMUM RATINGS Supply Voltage ................................................................................................................ 18V ........................................................................................... 18V .......................................................20mA DC Voltage Applied on any Pin Sink Current of VOUT Pin, LED Pin, and FLASH Pin Operating Temperature Range ............................................................................... 0C to 70C Storage Temperature Range .............................................................................. -65C to 150C ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 2 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 TEST CIRCUIT 390K R1 4.7F C1 Voltage Source + + 0.1F C2 GND +VDD LED TIMER 1.5K R7 VREF 20K R5 4.7K R4 VNTC MODE FLASH 1.5K R8 1.5K R6 150K R3 VBT VDD 0.1F C3 + +VDD 100F C4 - 150K R2 VOUT ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Supply Current -V Detection Level w.r.t.* Peak Value Voltage Protection Limits AIC1761 AIC1766 Battery Low Battery High Input Impedance of TIMER Pin Input Impedance of MODE Pin Output Resistance of LED Pin Fast Charge Trickle Charge Output Resistance of VOUT Pin FLASH pin Output Resistance Frequency Duty Cycle Reference Voltage Reference Source Current Temperature Fault Voltage Limits as Fraction of VREF *w.r.t.: with respect to (VDD=12.5V, Ta=25C, unless otherwise specified.) MIN. 9 TEST CONDITIONS SYMBO L VDD IDD TYP. MAX. 18 1.5 UNIT V mA % % -1 -0.25 VBT ZTIMER ZMODE RLED RVOUT 1 0.5 3.5 100 100 1 25 25 0.65 3.7 0.8 3.9 V V K K M Fast Charge Trickle Charge M Fast Charge Trickle Charge RFLASH FFLASH DFLASH VREF IREF 1.5 0.60 0.15 25 1 50 5.85 Hz % V mA Under-Temperature Over-Temperature NTCL NTCH 0.7 0.2 0.80 0.25 VREF VREF ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 3 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 TYPICAL PERFORMANCE CHARACTERISTICS 32 Output Resistance of VOUT pin vs Power Supply Voltage (Fast Charge Mode) 32 Output Resistance of LED pin vs Power Supply Voltage (Trickle Charge Mode) RVOUT () 28 28 RLED () 24 24 20 9 11 20 13 15 17 18 9 11 13 15 17 18 VDD(V) VDD(V) Output Resistance of FLASH pin vs Power Supply Voltage (Fast Charge Mode) 32 34 Output Resistance of VOUT pin vs Temperature (Fast Charge Cycle) RFLASH () 24 RVOUT () 9 11 13 15 17 18 28 30 26 20 22 0 20 40 60 80 VDD(V) Output Resistance of LED pin vs Temperature (Trickle Charge Cycle) 34 6.2 Temperature (C) VREF Reference Voltage vs Temperature 30 6.0 RLED (V) VREF (V) 26 22 0 20 40 60 80 5.8 5.6 0 20 40 60 80 Temperature (C) Temperature (C) ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 4 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) VBT (High) Limit vs Temperature 3.8 0.71 VBT (Low) Limit vs Temperature 3.7 0.67 VBT (V) 3.6 VBT (V) (V) 0 20 40 60 80 0.63 3.5 0.59 3.4 0.55 0 20 40 60 80 Temperature (C) Safety Timer vs Temperature (MODE pin = VDD) 45 Temperature (C) Safety Timer (min.) 43 41 39 37 35 0 20 40 60 80 Temperature (C) BLOCK DIAGRAM VREF VR3 VDD Voltage Regulator + VNTC (for 14 pin version) VR4 LED - + - Power On Reset GND FLASH (for 14 pin version) CHARGE CONTROL STATE MACHINE VOUT VR1 VBT + + VR2 - 13-Bit ADC Mode Select Timing Control Oscillator MODE TIMER ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 5 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 PIN DESCRIPTIONS VDD PIN GND PIN VBT PIN Supply voltage input. Ground. Input, to sense battery voltage. Input, to set IC operation mode. Input, for safety timer control. Voltage reference output. VNTC PIN LED PIN - Output, for LED indicator. VOUT PIN - Output, for LED indicator. FLASH PIN - Output, for LED indicator. (Available for 14-pin version only.) - Input, for temperature protection. (Available for 14-pin version only.) MODE PIN TIMER PIN VREF PIN - APPLICATION INFORMATIONS BATTERY PROPERTIES The basic principle of rechargeable battery systems, including NiMH and NiCd cells, is that the processes of charge and discharge are reversible. The charge characteristics of NiMH and NiCd cells look similar in that (1) the cell voltage at the end of charge drops and (2) the cell temperature increases rapidly near the end of charge. Fig. 1 shows the charge voltage and charge temperature characteristics of NiMH and NiCd cells. Notice that the cell voltage decline of NiMH cells at the end of charge is less pronounced than for NiCd cells. 1.7 80 The AIC1761/1766 is a battery fast charge controller IC that utilizes the following methods to terminate the fast charge process for NiMH or NiCd battery cells: Negative delta voltage cutoff (-V). Peak voltage timer cutoff (0V). Maximum temperature cutoff (TCO). Maximum voltage cutoff (VCO). Safety timer cutoff. The principle of operation of the AIC1761/1766 is described in the following section. Charge Current=1C 1.6 70 THE AIC1761/1766 OPERATION When power is first applied to the charge system, consisting of rechargeable battery cells, charge current source, the AIC1761/1766 and its associated external circuit, all internal digital circuit blocks of the AIC1761/1766 are reset by internal power-onreset circuitry. The internal control unit then checks the battery condition to prevent fast charge from taking place under battery fault conditions, i.e. cell voltage fault (VBT<0.65V or VBT>3.7V) or cell temperature fault (NTC>NTCL or NTC Cell Temperature (C) Cell Voltage (V) 1.5 NiCd Voltage NiMH 60 1.4 50 1.3 NiMH Temperature NiCd 40 1.2 30 1.1 0 20 40 60 80 100 20 Time (min.) Fig. 1 Typical Charge NiMH/NiCd Battery Characteristics of Fast-charge batteries are available where recharging takes for only 1 hour or less with a simple control circuit. One main purpose of the control circuit is to terminate the fast-charge process to prevent the temperature and internal pressure of the battery cell from building up to a damaging level which degrades or even destroys the battery cell. ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 6 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 The AIC1761/1766 constantly monitors the voltage at VBT pin, which rises as battery cells are being fast-charged till battery full condition is nearly approached. The battery temperature is also constantly being sensed to guard against abnormal temperature situations. VOUT pin will be pulled high by an external pull-up device and the fast charge process be switched to trickle charge when one of the following situations is encountered: A negative delta voltage (-V) at VBT pin is detected when compared to its peak value. The sampling rate of -V detection is 2seconds/ sample. The detection level of -V is -1% for the AIC1761 and -0.25% for the AIC1766. The battery voltage stays at its peak value for the duration determined by the peak voltage timer setting (0V). The VBT pin voltage exceeds the "high" battery voltage protection limit (VCO). The battery temperature, sensed by the thermistor divider, exceeds the fault temperature range (TCO). The selected safety timer period has finished. VOUT goes low for fast charge, safety timer starts counting. YES -V detector & peak voltage timer start working after initial period ends. Power ON If 0.65V YES VOUT goes high for trickle charge , -V detector reset, safety timer stops. NO If NTCL>NTC & NTC>NTCH -V detector & peak voltage timer working. If NTCL>NTC & NTC>NTCH NO YES VOUT goes high for trickle charge, -V detector reset, safety timer stops. If 0.65V VOUT goes high for trickle charge, NO Safety Timer and -V Detector reset TIMER PIN The TIMER pin can be used as follows to select one of the preset safety timer period and its corresponding periods of initial timer and peak voltage timer: NO If -V decline of VBT is detected. NO If safety timer period has finished. NO If peak voltage timer period has finished. YES YES TIMER Pin VDD GND Floating Safety Timer 40 80 min. min. Peak Volt- Initial Timer age Timer 2 min. 4 min. 8 min. 1.5 min. 3.0 min. 3.0 min. Fig. 2 Operation Chart of the AIC1761/1766 YES VOUT goes to high, fast charge finished, and trickle charge start. 160 min. ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 7 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 MODE PIN 1. Safety timer reduced by 512 times. 2. Initial timer reduced by 512 times. 3. Peak timer reduced by 64 times. The MODE pin determines the mode in which the IC works: MODE Pin Floating VDD GND Mode NORMAL TEST AC Function Normal operation 1/512 safety timer -V detector reset, timer stops (not reset) One critical requirement needs to be observed for -V detector of the AIC1761/1766 to work properly in TEST mode. That is, VBT pin voltage must be kept between approximately 2.8V to 3.3V, rather than 0.8V to 3.5V in NORMAL mode. The AIC1761/1766 will operate normally when the MODE pin is left floating ( a 0.1F capacitor is recommended to be tied to MODE pin if the charge circuit works in a noisy environment). The AIC1761/1766 otherwise works in following ways if the MODE pin is biased either to VDD or to GND: If the TEST mode function is to be utilized in production test, it has to be well planned and included in circuit design phase to make the voltages of VBT pin and MODE pin externally controllable. In addition, an externally controllable TIMER pin can further reduce test time required for testing the AIC1761/1766 in TEST mode. (A) AC Mode (MODE pin biased to GND) In the midst of normal charge operation, where VBT pin voltage is in the range from 0.8V to 3.5V and the preset safety timer has not run out, the safety timer will stop if the MODE pin is somehow pulled down to GND level. As long as the MODE pin remains low, the VOUT pin stays ON and LED pin OFF regardless whether the battery pack voltage declines (-V present) or not. The AC mode can be activated by pulling MODE pin to GND to avoid premature battery charge cutoff due to fluctuating charge current source. Switching MODE pin after the end of the safety timer has no effect on the AIC1761/1766 display outputs, i.e., VOUT pin stays OFF while LED pin stays ON. Fig. 3 shows the timing diagram for externally controlled VBT, TIMER, and MODE pin voltages of a recommended AIC1766 charge circuit production test scheme, utilizing TEST mode function. Output waveforms of VOUT and LED pins (and FLASH pin for 14 pin version) of a properly functioning AIC1766 are also shown in the figure. In timer segments 4, 8 and 10, VOUT pin should change from ON to OFF, LED pin from OFF to ON, and FLASH pin from ON to flashing output (approximately 4 Hz). For the reset of time, VOUT pin should remain ON, LED pin OFF, and FLASH pin ON. (B) TEST Mode (MODE pin biased to VDD) An unique feature of the AIC1761/1766 is that it can be put into a TEST mode by pulling the MODE pin to VDD, allowing verification tests for the AIC1761/1766 charge circuit to be performed in a few tens of seconds, extremely valuable in final phase of production. When the AIC1761/1766 is in TEST mode, all the internal timers are reduced by the following factors when compared to normal operation: ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 8 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 Init. VBT Timer Set Up TIMER Pin MODE Pin 3V Peak Timer Test (min.1.875S) AC Mode VBT Set Up -V Test (min. 3.75S) AC Mode Safety Timer Test VDD VDD/2 GND VDD 2.995V GND 3V 2.995V *2.988V GND VBT Pin VOUT Pin LED Pin FLASH Pin 2.98V 2.8V ON OFF OFF ON ON 4.27Hz TIME Section 0.5S 1 0.4S 2 1.5S 3 1.5S 4 20mS 5 0.4S 6 4.7S 7 1.5S 8 20mS 9 2.5S 10 0.5S 11 * 2.972V for the AIC1761 Fig. 3 Timing Diagram of AIC1766 in Test Mode ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 9 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 The LED indicators work as the following table: LED PIN Fast Charge Trickle Charge VBT Abnormal OFF ON OFF VOUT PIN ON OFF OFF FLASH PIN ON FLASH OFF LED pin is used in conjunction with VOUT pin while FLASH pin works alone. +VIN R14+R13 must be greater than 535K if R15 is 150K (refer to Fig. 4). When the battery pack is disconnected from the charging circuitry the VBT pin voltage must be higher than 4.0V, dictating VBAT node voltage of the charging circuitry to be higher than 18.3V (4V x 4.57). Practically, however, the charging circuit supply voltage +VIN should be higher than 18.5V in order to ensure proper operation. In the case that supply voltage +VIN can not meet this requirement, application circuit of Fig. 4 can be adopted to get around this problem. Referring to the APPLICATION EXAMPLES (Fig. 10), the temperature limits beyond where the fast charge is prohibited can be set by choosing values for resistors and the thermistor of the thermistor divider according to the following formula: R18 = 3.57 RT1 RT2/ (RT1 - RT2) R19 = 10 RT1 RT2 / (1.218 RT1 - 11.2 RT2) RT1 : Thermistor resistance at low temperature limit. RT2 : Thermistor resistance at high temperature limit. BATTERY VOLTAGE DIVIDER 27K VBAT R2 150K R13 9012 Q2 9012 Q1 270K R3 R14 R7 VBT 150K 390K 0.1F C1 R5 270K + 0.1F C3 150K R15 4.7F C2 To ensure proper operation of the AIC1761/1766, selection of resistor values for battery voltage divider must meet the following two crucial requirements: 1. When the battery pack is disconnected from the charge circuitry, the voltage of VBT pin must be higher than 4.0V or lower than 0.5 V to put the AIC1761/1766 in reset status, where VOUT and LED pins become high impedance and FLASH pin (only for 14 pin version) goes to high level. 2. When the battery pack is connected in normal operation, the VBT pin voltage must remain in the range of 0.8V to 3.5V even when the battery pack voltage reaches to its peak when near full charge. Take charging a 8-cell battery pack as an example. The highest voltage would be 16V when fully charged if the highest voltage of a fully charged battery cell is assumed to be 2V. Since the VBT pin voltage is restricted to be no higher than 3.5V, the battery voltage divider ratio must be higher than 3.57 (16V/3.5V -1). In other words, resistor ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. GND Fig. 4 Battery Voltage can be Raised to VIN - 0.9V when being Charged. CHARGER CIRCUIT DESIGN TIPS 1. A stable constant charge current is crucial for reliable precision -V detection by the AIC1761/1766 since fluctuation of the charge current can cause fluctuation of the battery terminal voltage due to battery internal series resistance, which will likely result in errors -V detection by a properly functioning AIC1761/1766. To prevent the AIC1761/1766 from overvoltage damage, make sure that none of AIC1761/1766 pins sees any voltage beyond the supply voltage, which needs to be between +9V and +18V. 2. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 10 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 3. Cell Voltage (V) 1.6 50 4. Critical components need to meet adequate rating to prevent heating-up of these components from causing circuit malfunction. Since the AIC1761/1766 is fabricated with CMOS process, cares must be taken in handling this device to avoid possible damage from electro-static discharge. Voltage 1.5 40 5. Temperature 1.4 30 AIC1766 1.3 0 20 40 60 80 20 EXPERIMENTAL RESULTS Experiments have been conducted to verify the AIC1761/1766 operation with NiCd and NiMH battery cells of various brands. Actual results shown in the following figures clearly indicate that the negative delta voltage detector and the peak voltage timer of the AIC1761/1766 have precisely detected the tiny cell voltage drops or the cell voltage peaks and subsequently terminated the fast charge process after batteries are fully charged. The battery cell temperatures were all under safety levels. Note that the fast charge for the NiMH battery in Fig. 5 is terminated by the peak voltage timer (0 V ) while the fast charge for the NiCd battery in Fig. 6 is terminated by the -V detector. 1.6 60 Charge Time (min.) Fig. 6 Charge Characteristics of NiCd Battery 1.6 60 Charge Current = 1A Cell Capacity =1000mAH 1.5 50 Voltage 40 1.4 Temperature 30 1.3 AIC1761 1.2 0 10 20 30 40 50 60 20 70 Charge Time (min.) Fig. 7 Charge Characteristics of NiMH Battery Charge Current = 1A Cell Capacity = 1000mAH Cell Temperature(C) AIC1766 50 1.7 60 Cell Voltage (V) 1.5 Voltage 40 1.6 50 1.4 Voltage 40 Temperature 30 1.5 1.3 AIC1766 20 1.2 0 20 40 60 80 1.4 30 AIC1761 Temperature 1.3 20 0 20 40 60 80 Charge Time (min.) Fig. 5 Charge Characteristics of NiMH Battery Charge Time (min.) Fig. 8 Charge Characteristics of NiCd 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. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 11 Cell Temperature(C) Charge Current=0.7A Cell Capacity=700mAH Cell Voltage(V) Cell Temperature(C) Cell Voltage(V) Cell Temperature(C) If the battery charge current is high, say, over 1.5A, quality of circuit board layout and wiring connection points become increasingly important in the charger circuit reliability. 1.7 60 Charge Current=0.7A Cell Capacity=700mAH AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 APPLICATION EXAMPLES R8 +VIN 12~28 V C1 220F 35V + D1 1N4148 R1 2K *L1 220H C3 4.7F + 50V + D3 1N4148 D4 1N5819 R4 1K # BATTERY R5 100K R6 51K + C5 4.7F 470 ZD1 9.1V + C7 100F R2 1.2K LED1 RED R9 1K LED2 GREEN R10 1K Q1 2N3904 D5 1N4148 **RS C4 220F 35V 0.33 1W 1 SC 2 SE 3 TC C2 1nF 4 GND AIC1563 FB VCC IS BST 8 7 6 D2 1N5819 R7 150K C6 0.1F 1 2 3 4 VBT GND VREF VDD 8 7 6 5 TIMER VOUT MODE LED 5 *L1=MPP Core or Iron Powder Core **Fast Charge Current:(0.3/RS)A # 3~5 Cells for VIN=12~28V # 3~6 Cells for VIN=15~28V AIC1761/66 Fig. 9 Battery Charge Circuit for NiMH/NiCd Battery with Wide Range Input Voltage +VIN 1N5819 D1 R1 470 A1012 Q1 1N5819 D2 R17 R4 560 10 12 11 R8 1.5K 494 13 7 5 6 16 3 15 2 R6 C3 R11 14 LED1 RED R10 2K 330 ZD1 16V 4 R9 10K L1 400H C8 0.1F VBAT R13 1.5K R14 VDD TIMER MODE 390K 9 1 8 R18 R19 AIC1766 LED VOUT 0.1uF + C5 C4 100F 25V GND C6 0.1F VNTC R16 150K C7 4.7F 6.3V + C1 220F 25V + R5 5.1K 27K R7 1.1K C2 1nF Q2 9014 VBT R3 33K R2 6.8nF 20K R12 1.7K R15 150K VB- GND 0.2 Note: VIN should be higher than 10V, ZD1 is required when VIN exceed 18V. Fast charge current is approximately 1A. Adjustable through R7. Trickle charge current is adjustable through R12 Fig. 10 Step-Down Rechargeable Battery Charger ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 12 BATTERY LED2 GREEN VREF THERMISTOR AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 APPLICATION EXAMPLES 2A FUSE 50H L1 D2 (CONTINUED) Battery Pack 220 R10 100K R9 + 100F C4 +VIN (VIN < VBAT) IN5819 240K R3 + C2 VBAT 220F 150 R1 SD VOUT LBI LBO FB VIN EXT GND R4 33K 0.1F C5 Charging VBT GND VREF VDD VOUT LED 1.5K R12 1.5K R13 Trickle Q1 IRFD020 1N4148 D3 4.7F 12K R2 R5 33K C3 10nF 100K R6 RIF 0.82 R11 120K 22K C6 R7 1N4148 D1 + TIMER MODE 4.7V 100F + C1 AIC1630 AIC1761/1766 ZD1 Note: Charging current =0.8A (RIF sets the Charging Current) VIN must be lower than VBAT. Short Circuit Condition is protected with a 2A Fuse. FIG. 11 Step-Up Rechargeable Battery Charger + IN5819 D2 240K R4 C2 TIP42C Q3 47K R3 Q2 R2 750 + RIT 75K Battery Pack 220 R12 R10 100F C4 120K + VIN (+VIN can be either higher or lower than the battery voltage.) 0.1F C5 VBT GND TIMER MODE VREF VDD VOUT LED 50H VBAT 220F SD VIN EXT VOUT LBI LBO FB IRFD020 Q1 100K 150 R1 R6 330 1.5K R13 Charging Charging 1.5K R14 L1 12K R5 C1 4.7V 100F 2N3904 AIC1630 ZD1 120K R15 AIC1761/1766 Note: Fast Charge Current = 0.8A @VIN RIF sets Fast Charge Current, RIT sets Trickle Charge Current Typical Efficiency = 75%. With Short Circuit Protection. FIG. 12 Step-Up/Down Rechargeable Battery Charger 330 +VIN 9~18V 10K R2 R4 D1 VBAT C2 BATTERY 4.7F 2~8 cells 120 R15 9V ZD1 R9 390K 150K 0.1F Q6 9014 0.1F C5 + C6 100F 1.5K R12 Trickle 220 R3 TIP32C Q3 680 R5 C1 0.1F 9014 Q4 1N4001 4.7K R6 1.5K R14 150K R10 R1 20K 9014 Q2 9014 Q1 + R11 C3 VBT GND TIMER MODE VREF VDD VOUT LED 2 R7 10 R8 10K R13 9014 Q5 AIC1761/1766 Note: VIN=9V~18V for 2~8 cells Fast Charge Current=400mA ( V BE 0.65 ) R7 / /R8 R7 / /R8 FIG. 13 Step-Down Low-Side Current Sense Pulse Battery Charger ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 13 Trickle + GND 2N2222 Q4 2N3904 Q5 RIF 0.82 R11 22K R9 + C3 4.7F AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 APPLICATION EXAMPLES (CONTINUED) VBAT of Battery IN4001 150 R3 9012 Q1 To VBT pin of AIC1761/1766 12K R1 R5 33 2W R26 3.9K 1K R2 9014 Q3 S1 Final Voltage of Battery 6V 5V 4V 3V R26 6.8K 5.1K 3.9K 2.7K 9014 Q2 The final voltage of battery is determined by R26. Discharge current is decided by R5. S1: Push to initiate discharge Fig. 14 Discharge Circuit of Rechargeable Battery Note: +VIN 0.1F 4.7M R1 330K R2 9014 Q1 4.7M R33 100K R5 C33 9014 Q2 2.4K R4 TIMER VDD MODE AIC1761/1766 VOUT LED GND VREF VBT GND Note: Fig. 15 Frequency (about 1Hz) is determined by R33 and C33. LED will flash when LED pin goes low. Flashing-LED Circuit for Trickle Mode +VIN 1nF 100K R2 Q1 9014 240K R33 100K R4 C33 10K R5 To Buzzer Q2 9014 VDD TIMER MODE 1M R1 AIC1761/1766 VOUT LED GND VREF VBT GND Note: Fig. 16 Frequency (about 1Hz) is determined by R33 and C33. Buzzer will be activated when LED pin goes low. Buzzer Circuit for Trickle Mode ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 14 AIC1761/1766 BATTERY CHARGE CONTROLLER SPEC NO: DS-1761-02 PHYSICAL DIMENSION 8 LEAD PLASTIC DIP 9.30.3 8 LEAD PLASTIC SO 4.800.20 6.20.2 3.80.2 8.00.5 3.30.1 0.60.3 3.20.3 2.50.1 10max 8.51.0 0.50.1 2.540.10 1.270.10 0.250.10 6.00.2 0.015X45 1.50.2 0.2 0.1 0.450.10 8 max. 14 LEAD PLASTIC DIP 14 LEAD PLASTIC SO 8.60.2 19.00.5 6.20.2 1.50.5 8.00.5 3.30.1 0.60.3 3.20.1 0.250.1 10 max. 8.51.0 0.50.1 2.540.10 3.80.2 6.00.2 0.38 x45 0.250.10 1.270.10 1.50.2 0.20.1 0.450.05 8 max. UNIT: mm ANALOG INTEGRATIONS CORPORATION 4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C. www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 15 |
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