Charging state indication device and charger
A charging state, indicating device technology, applied in circuit devices, battery circuit devices, current collectors, etc., can solve the problems of low reliability, many components, and low power efficiency, and achieve simple and reliable circuits, low loss, and work efficiency. high effect
Active Publication Date: 2010-12-01
FREMONT MICRO DEVICES SHENZHEN LTD
View PDF0 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] 1. When the circuit outputs the rated load, the voltage on the capacitor 213 is 0.8V-1.0V higher than VOUT. If the primary side control (PRIMARY CONTROL) mode is used, the no-load voltage at the output terminal will be 0.8-1V higher than the rated load voltage , so this circuit cannot be used in the primary side control mode, only in the secondary side control mode;
[0007] 2. Since the circuit detects the voltage drop generated when the charging current flows through the resistor 219 and the diode 220, the power supply efficiency is low;
[0008] 3. The circuit uses many components, the cost of the power supply is high, and the reliability is low
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0054] Such as figure 2 As shown, the charger of the present invention includes a charging power supply and a charging state indicating device. The charging state indication device includes a charging state detection chip 100 connected between the primary winding of the transformer of the charging power supply and the ground, and a display module 200 for displaying the charging state. Wherein, the charging state detection chip 100 includes a detection module 101 for detecting the charging state of the charging power source and a comparison module 102 for judging the current charging state according to the detected charging state.
[0055] exist figure 2 In the illustrated embodiment, the FB terminal of the charging state detection chip 100 is connected to the anode of the diode D206 through the resistor R217, and the cathode of the diode D206 is grounded through the capacitor C205. The anode of the diode D206 is also connected to one end of the primary auxiliary winding of...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a charger and a charging state indication device used in the charger. The charger comprises a charging power supply and the charging state indication device, and is characterized in that the charging state indication device comprises a charging state detection chip connected between a primary winding of a transformer of the charging power supply and the ground, and a display module used for displaying the charging state, wherein the charging state detection chip comprises a detection module for detecting the charging situation of the charging power supply, and a comparison module used for judging the current charging state according to the detected charging situation. The implementation of the charger and the charging state indication device used in the charger can use the control mode on the primary side; furthermore, the charger has simple and reliable circuit, high working efficiency and small loss.
Description
technical field [0001] The present invention relates to a charging device, more particularly, to a charger and a charging state indicating device used in the charger Background technique [0002] At present, charging status indicating devices are generally used on chargers to indicate the charging status. The known charging status indicating devices all adopt the secondary side control (SECONDARY CONTROL) mode. By using a red and green dual-color common cathode LED 223, a PNP transistor 222, a silicon rectifier diode 220, resistors 219, 221, 224 to achieve (please refer to figure 1 ). [0003] When the product V 219 of the VOUT output current Io and the resistor 219 (that is, the voltage drop on the resistor 219) is greater than the VBE of the transistor 222 (about 0.6V), that is, Io*R219>0.6V, the transistor 222 is saturated and turned on, and the LED is on. red. Since the saturation voltage drop VCE of the triode 222 is about 0.3V, and the red LED in the LED 223 has ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G01R31/40
Inventor 廖伟明谷文浩郑曰龙波
Owner FREMONT MICRO DEVICES SHENZHEN LTD