Nimh Battery Charger using LT 4060

This is the outline of a powerful battery charger and efficient Ni-MH IC LT4060 from Linear Technologies. In addition to the Ni-MH Nickel-cadmium can also be gained by slightly modifying the load circuit.For Ni-Cd CHEM connect pin (pin12) of the IC + Vcc.Here circuit is configured to load 2 connected cells in series. By altering the connections and SEL1 pins SEL0 up to 4 batteries in series can be charged with this circuit.

To load a single cell, are connected and SEL1 pin to GND SEL0. For filling two cells connected to GND and Vcc SEL0 SEL1. For filling three cells, connected to VCC and SEL0 SEL1 to GND. For filling 4 cells, and SEL1 pins SEL0 connect to VCC. The circuit also has the charging temperature NTC thermistor based qualification.An connected to the NTC pin (pin11) of the IC operates as the temperature sensor.

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Battery Charger Circuit LTC4060 - NiMH/NiCd

This low cost and easy to build Battery Charger Circuit LTC4060 - NiMH/NiCd is suitable for automatically charging a large range of batteries for many applications. This 'intelligent' charger was designed for top current and fast charge applications like cordless power tools and model racing cars. These battery packs are expensive and typically difficult to buy. This charger uses the cell manufacturer's recommended charge method, to safely and quickly charge batteries.

Linear Technology Corporation introduces the LTC4060, an autonomous 1- to 4-cell, 0.4A to 2A linear NiMH and NiCd battery charger. The LTC4060 includes all the functions needed for a battery charger circuit. the look is straightforward and desires only 3 passive elements. The LTC4060 additionally eliminates the need for a way resistor and blocking diode, that increases potency and lowers the answer value. This IC is targeted at applications including portable medical equipment, automotive diagnostic systems and industrial/telecom take a look at devices.

Battery Charger Circuit LTC4060 - NiMH/NiCd Features

• Complete Fast Charger Controller for Single, 2-, 3- or 4-Series Cell NiMH/NiCd Batteries
• No Firmware or Microcontroller Required
• Termination by –∆V, Maximum Voltage or Maximum Time
• No Sense Resistor or Blocking Diode Required
• Automatic Recharge Keeps Batteries Charged
• Programmable Fast Charge Current: 0.4A to 2A
• Accurate Charge Current: ±5% at 2A
• Fast Charge Current Programmable Beyond 2A with External Sense Resistor
• Automatic Detection of Battery
• Precharge for Heavily Discharged Batteries
• Optional Temperature Qualified Charging
• Charge and AC Present Status Outputs Can Drive LED
• Automatic Sleep Mode with Input Supply Removal
• Negligible Battery Drain in Sleep Mode: <>
• Manual Shutdown
• Input Supply Range: 4.5V to 10V
• Available in 16-Lead DFN and TSSOP Package

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6Volt Gel Cell Charger

6Volt Gel Cell Charger Circuit Diagram

This Circuit needs a adapted 10V-DC advanced end able of bartering 2 Amps. Starts the allegation aeon at 240mA and at abounding allegation switches automatically to a float action (trickle charge) of 12mA.

The capacitors are the bowl 50V (or better) type. Switching transistor Q1 is a NPN, Si-Power Output/SW, with a TO-220 case and can be replaced with a acceptable acting like the NTE291, ECG291, etc.

Timer/Oscillator U1 is a 8-pin NE555V and can be replaced with a NTE955M or ECG955M.

Resistors R4, R5, R6, and R7 are 1% metal blur types. They may not be accessible at your bounded Radio Shack/Tandy abundance and accept to be ordered in. Try Electro-Sonic or Newark Electronics accumulation stores.

Part List
Resistors are carbon, 1/4 watt, 5% tolerance, unless otherwise indicated.

 R1 = 22 ohm, 1W            C1 =  0.1µF, ceramic
R2 = 270 ohm               C2 =  0.1µF, ceramic
R3 = 220 ohm               D1 = 1N4001
*R4 = 715 ohm, 1%           Q1 = TIP31A, B, C (or equivalent)
*R5 = 3.57K, 1%             U1 = NE555V (or equivalent)
*R6 = 1.40K, 1%             S1 = Toggle switch, ON-OFF
*R7 = 1.47K, 1%

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1.5 volt Mobile Phone Travel Charger

1.5 volt Mobile Phone Travel Charger

Here is an ideal mobile charger application 1.5 volt pen beef to allegation adaptable buzz while traveling. It can furnish corpuscle buzz array three or four times in places area AC ability is not available.

Most of the Adaptable buzz batteries are rated at 3.6 V/500 mA. A distinct pen bake corpuscle can accommodate 1.5 volts and 1.5 Amps current. So if four pen beef are affiliated serially, it will anatomy a array backpack with 6 volt and 1.5 Amps current. When ability is activated to the ambit through S1, transistor T1 conducts and Green LED lights.

When T1 conducts T2 additionally conducts back its abject becomes negative. Charging accepted flows from the beneficiary of T1. To abate the charging voltage to 4.7 volts, Zener diode ZD is used. The achievement gives 20 mA accepted for apathetic charging. If added accepted is appropriate for fast charging, abate the amount of R4 to 47 ohms so that 80 mA accepted will be available. Points A and B are acclimated to affix the charger with the adaptable phone. Use acceptable pins for this and affix with actual polarity.

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