Description

GG105X is a high-performance dual-winding chip for PSR chargers, designed mainly for lithium battery chargers, eliminating the auxiliary winding of the transformer. The GG105X chip integrates current sampling resistors to optimize system costs. GG105X realizes high-precision constant voltage function through built-in programmable module and can directly charge lithium batteries; GG105X has a built-in LED rotating light function, and the precise rotating light current point can accurately indicate the charging status. The GG105X chip realizes constant current and constant voltage functions by detecting the current and voltage on the primary side of the transformer. It has built-in loop stability compensation and can omit TL431, optocoupler and auxiliary winding power supply. GG105X integrates multiple protection functions, including VCC clamping/undervoltage protection, LED indicator open and short circuit protection, FB resistor open and short circuit protection, output short circuit protection, over temperature protection, etc. Features ◆ Integrated BJT, suitable for isolation solutions within 10W power range ◆ Dual-winding transformer, integrated sampling resistor, optimized system cost ◆ Built-in AC line compensation and programmable output line compensation ◆ High-precision constant voltage and constant current control ◆ Work in discontinuous mode, PFM and PWM work together ◆ Built-in LED light function ◆ FB resistor open short circuit protection function ◆ Output short circuit protection ◆ Chip over temperature protection ◆ VCC over-voltage and under-voltage protection ◆ Package type: SOP-7 ◆ Output power: GG1051 ≤3W; GG1052 ≤6W; GG1053 ≤10W Applications ◆ Adapter/charger: mobile phones, walkie-talkies, flashlights, headlamps and other portable devices ◆ Lithium battery chargers for power tools, electric sprayers, small appliances, etc.