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3.6 Charger IC (MP26021)
Figure.3-6 MP26021 FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION
The MP26021 is a linear, high-performance single cell Li-Ion battery charger. By integrating high
voltage input protection into the charger IC, the MP26021 can tolerate an input surge up to 28V.
The device features constant current (CC) and constant voltage (CV) charging modes with
programmable charge currents (85mA to 1A), programmable battery full threshold, thermal
protection, battery temperature monitoring, reverse current blocking and trickle charge. The device
also provides AC adapter power good and charge status indications to the system.
MP26021 is available in a 10-pin 3mm x 3mm QFN package.
FEATURES
‧
Input Surge Up to 28V
‧
Adapter or USB Input
‧
Programmable Charge Current: 85mA to 1A
‧
Proprietary Constant Voltage Auto Recharge
‧
Proprietary Over-Voltage Protection
‧
0.75% VBATT Accuracy
‧
<1µA Battery Reverse Current
‧
90µA Standby Current from VIN
Summary of Contents for GB115
Page 13: ...13 3 TECHNICAL BRIEF 3 1Digital Main Processor Figure 3 1 PMB7890 FUNCTIONAL BLOCK DIAGRAM ...
Page 32: ...32 3 9 LCD Interface Figure 3 9 1 LCD Interface Figure 3 9 2 Charging PUMP Interface ...
Page 33: ...33 LCD Interface Pin Function Charging PUMP Pin Function ...
Page 34: ...34 3 10 SIM Card Interface Figure 3 10 SIM CARD Interface ...
Page 35: ...35 3 11 KEYPAD Interface Figure 3 11 KEY PAD Interface ...
Page 38: ...38 3 14 Micro SD Interface ...
Page 40: ...40 Circuit Diagram TP1 TP6 TP3 TP4 TP2 TP5 ...
Page 42: ...42 4 2 SIM Card Trouble Test Point Circuit Diagram ...
Page 44: ...44 4 3 Vibrator Trouble Test Point Circuit Diagram ...
Page 46: ...46 4 4 Keypad Trouble Test Point Circuit Diagram ...
Page 47: ...47 Checking Flow Change Metal Dome Check Metal Dome Start Change PCB NG OK ...
Page 48: ...48 4 5 RTC Trouble Test Point Circuit Diagram ...
Page 50: ...50 4 6 Key Backlight Trouble 1 1 1 Test Point ...
Page 51: ...51 Circuit Diagram ...
Page 53: ...53 4 7 LCM Backlight Trouble Test Point Circuit Diagram ...
Page 55: ...55 4 8 LCM Trouble Test Point Circuit Diagram ...
Page 57: ...57 4 9 Microphone Trouble Test Point Circuit Diagram ...
Page 59: ...59 4 10 Receiver Trouble Test Point Circuit Diagram ...
Page 61: ...61 4 11 Speaker Trouble Test Point Circuit Diagram ...
Page 63: ...63 4 12 Headphone Trouble Test Point ...
Page 64: ...64 Circuit Diagram TP1 TP2 ...
Page 67: ...67 4 13 Charging Trouble Test Point Circuit Diagram ...
Page 69: ...69 4 14 FM Radio Trouble Test Point ...
Page 70: ...70 ...
Page 71: ...71 Circuit Diagram ...
Page 75: ...75 4 15 Camera Trouble Test Pointer TP1 TP2 TP3 ...
Page 76: ...76 Circuit Diagram ...
Page 78: ...78 4 16 Micro SD Trouble Test Pointer TP1 ...
Page 83: ...83 RX Trouble CIRCUIT ...
Page 86: ...86 CIRCUIT ...
Page 88: ...88 TX Trouble CIRCUIT ...
Page 91: ...91 CIRCUIT ...
Page 93: ...93 5 DOWNLOAD 5 1 Download Setup ...
Page 102: ...102 DownLoad success DownLoad Pass will display green color Fig 11 Download success ...
Page 105: ...105 Don t choose is normal idle mode ...
Page 106: ...106 6 BLOCK DIAGRAM ...
Page 107: ...107 7 CIRCUIT DIAGRMA ...
Page 108: ...108 ...
Page 109: ...109 ...
Page 110: ...110 ...
Page 111: ...111 ...
Page 112: ...112 ...
Page 113: ...113 8 BGA IC PIN Check 8 1 BGA PIN Check of MCU PMB7890 No NC pin ...
Page 114: ...114 8 2 BGA PIN Check of Memory ...
Page 115: ...115 8 3 BGA PIN Check of Camera driver AIT701A No NC pin ...
Page 116: ...116 9 PCB LAYOUT ...
Page 139: ...139 13 EXPLODED VIEW REPLACEMENT PART LIST 13 1 EXPLODED VIEW ...
Page 140: ...140 ...