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Index 243

MAX834 monitoring battery low voltage disconnection power supply circuit

Published:2011/4/22 4:58:00 Author:Nicole | Keyword: battery low voltage, power supply

MAX834 monitoring battery low voltage disconnection power supply circuit
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Circuit Of Float-type Battery Charger

Published:2011/4/21 1:18:00 Author:Tina | Keyword: Float-type, Float-type Battery Charger

Circuit Of Float-type Battery Charger
Figure 1 is one kind of Nickel-cadmium battery and Ni-MH battery charger circuit. This circuit is mainly used to charge the battery of nickel-cadmium and nickel metal hydride (5 #, 7 #). Charge mode is the power float type. The float means the power is continuous DC but not by the pulse voltage type. Battery float charge type is the most commonly way to charge the household batteries, the advantage is the simple circuit and the disadvantage is difficult to reach the battery's nominal capacity. This disadvantage is not obvious to the small-capacity rechargeable battery, but to the large capacity battery, this disadvantage will not only shorten the use time of battery, but also shorten the battery life, so to the large capacity battery such as the electric bicycle, we'd better not use the float charge type. (View)

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TWL2213 typical application circuit(charging circuit)

Published:2011/4/22 4:29:00 Author:Nicole | Keyword: typical application, charging

TWL2213 typical application circuit(charging circuit)
TWL2213 is mainly used to the power management of portable equipment or device such as PAD, telephone, pager which adopts lithium ion battery to supply power. The typical circuit diagram is shown as below: (View)

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Multi-channel regulated power supply composed of MC1568, LM309K

Published:2011/4/22 4:41:00 Author:Nicole | Keyword: regulated power supply

Multi-channel regulated power supply composed of MC1568, LM309K
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±12V regulated power supply composed of MC7812 positive pressure and MC7912MC(negative pressure)

Published:2011/4/22 4:16:00 Author:Nicole | Keyword: ±12V regulated power supply, positive pressure, negative pressure

±12V regulated power supply composed of MC7812 positive pressure and MC7912MC(negative pressure)
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Polarity reversal boost power supply circuit diagram composed of LT1172

Published:2011/4/2 4:38:00 Author:Nicole | Keyword: boost power supply

As shown, this is a polarity reversal boost power supply which is composed of boost switching regulator LT1172. The output voltage is -10 ~-30V, output current is 25mA, conversion efficiency is 80%. It uses the LT1172 to boost, and connect a charge pump which composed of C1, C2, D2, D3 on the output termination of LT1172, then to complete the output voltage polarity reversal. (View)

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Multi-Control Two Switch Circuit

Published:2011/4/21 20:18:00 Author:Robert | Keyword: Multi-Control, Two Switch Circuit

Multi-Control Two Switch Circuit is shown below: (View)

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±15V symmetric regulated power supply composed of LC1468G

Published:2011/4/22 3:08:00 Author:Nicole | Keyword: ±15V regulated power supply

±15V symmetric regulated power supply composed of LC1468G
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Power supply soft-start circuit composed of L200

Published:2011/4/22 3:12:00 Author:Nicole | Keyword: soft-start, power supply

Power supply soft-start circuit composed of L200
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Improved TOP222P switching power supply module

Published:2011/4/21 5:51:00 Author:May | Keyword: Improved, switching, power supply module

Improved TOP222P switching power supply module
The AC input voltage of small switching power supply module using TOP222P chip is 100~245V. And it is two ways DC output. The largest DC output is 10v800mA(15v800mA)、5v800mA, the total output is less than 15W, power supply efficiency is 6％～85％. (Note 1: the output 5V group of this power module has the function of voltage regulation, another group output voltage can set like: it is 15V when connected with + , it is 10V when connected with 0 ).voltage accuracy: 4%;votlage adjustment rate: 0.7%;5V load adjustment rate: 1%;10V load adjustment rate: 8%;or 15V load adjustment rate: 10%;The size of small power supply module: length is 46mm, width is 28mm, height is 20mm.parts lists of small power supply module name quantityTOP222P chip 1EE19 transformer 1UF4007diode 1PC817 opto-coupler 13.3UH bead 23.6 voltage regulator diode 1471 voltage dependent resistor 110UF/400V electrolysis 1102/1KV ceramic chip 1470UF/25V electrolysis 1470UF/25V electrolysis 147UF/25V electrolysis 1100UF/25V electrolysis 1UF4004 diode 2IN4148 diode 1(can replace by UF4004 diode)1N4007diode 433/1W resistor 156K/0.25W resistor 110/0.25W resistor 1100/0.25W resistor 11K/0.25W resistor 13mmLED 1circuit wafer 1 (View)

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Pulse Battery Charger Circuit

Published:2011/4/21 7:02:00 Author:Christina | Keyword: Pulse, Battery Charger

The Pulse Battery Charger Circuit is as shown: (View)

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Common power supply load circuit with bulb

Published:2011/4/22 2:29:00 Author:Nicole | Keyword: power supply load, bulb

Common power supply load circuit with bulb
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+5V 4W switching power supply circuit composed of single chip TOP210

Published:2011/4/21 2:21:00 Author:May | Keyword: +5V 4W, switching power supply

+5V 4W switching power supply circuit composed of single chip TOP210 is shown in the diagram. DC input voltage Ui is got after 85~265V AC rectifying and filtering. The voltage adjustment rate of this switching power supply is Sv=±1.5％ (input DC voltage is 104~370V), load adjustment rate Si=±5％ (load current changes from 10% to 100%), output ripples voltage is ±25mV. When the lead wire of Ui and TOP210 is shorter, it also can save IC. Clamping protection circuit consists of VDz and VD1. After the secondary voltage rectifying and filtering by VD2, C2, L and C3, it can get +5V, 0.8A output. Feed back winding first rectifying by VD3, than it is smoothed filtering by R and C4 and offer control end current to TOP210. (View)

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Buck chopped wave switching regulated power supply circuit composed of CW1524

Published:2011/4/20 22:26:00 Author:May | Keyword: Buck, chopped wave switching, regulated power supply

Buck chopped wave switching regulated power supply circuit composed of CW1524
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Solar power supply equipment

Published:2011/4/21 8:17:00 Author:Nicole | Keyword: solar, power supply equipment

Solar power supply equipment
(a)photoelectric cell is in series, parallel; (b)adding diode VD, to avoid storage battery charging to photoelectric cell. (View)