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参数资料
型号： LM3655TLX
厂商： NATIONAL SEMICONDUCTOR CORP
元件分类： 电源管理
英文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, BGA25
封装： 2.5 X 2.5 MM, MICRO SMD, 25 PIN
文件页数： 12/21页
文件大小： 833K
代理商： LM3655TLX
Table of Contents
1.0 General Description ..................................................................................................................................... 1
2.0 Key Specifications ........................................................................................................................................ 1
3.0 Features ....................................................................................................................................................... 1
4.0 Applications .................................................................................................................................................. 1
5.0 Typical Application Circuit ............................................................................................................................ 1
6.0 Connection Diagrams and Package Marking .............................................................................................. 3
7.0 LM3655 Pin Description ............................................................................................................................... 3
8.0 Ordering Information .................................................................................................................................... 4
9.0 Operation Description .................................................................................................................................. 4
10.0 Pin Functions ............................................................................................................................................. 4
10.1 V
IN ............................................................................................................................................................ 4
10.2 CELL ........................................................................................................................................................ 4
10.3 RADIO_B+ ............................................................................................................................................... 4
10.4 V
DETECT
................................................................................................................................................... 5
10.5 DISABLE ................................................................................................................................................. 5
10.6 CHEMISTRY ............................................................................................................................................ 5
10.7 HIB_EN .................................................................................................................................................... 5
10.8 HIS_DIS ................................................................................................................................................... 5
10.9 BATT_DETB ............................................................................................................................................ 5
10.10 CHRG_STATE ....................................................................................................................................... 5
10.11 CHRG_DET ........................................................................................................................................... 5
10.12 CNTRL ................................................................................................................................................... 5
10.13 EXT_PWR_ON ...................................................................................................................................... 6
11.0 Charge Control Functions .......................................................................................................................... 6
11.1 GENERAL OPERATION .......................................................................................................................... 6
11.2 EXTERNAL POWER SUPPLY DETECT ................................................................................................. 6
11.2.1 V
DETECT Circuit
................................................................................................................................... 6
11.2.2 Debounce Function ............................................................................................................................ 7
11.2.3 Power Supply Test Pulses ................................................................................................................. 8
11.2.4 Low Cell Voltage Charging (Pre-Charging) ....................................................................................... 9
11.2.5 Full-Rate Charging ........................................................................................................................... 10
11.2.6 Trickle/Top-Off Mode ........................................................................................................................ 11
11.2.7 Peak Detector Function .................................................................................................................... 11
12.0 Discharge Control Functions .................................................................................................................... 12
12.1 GENERAL DESCRIPTION .................................................................................................................... 12
12.2 RADIO+ GENERATION ........................................................................................................................ 12
12.3 UNDER-VOLTAGE CUT-OFF ............................................................................................................... 13
12.4 POWER CUT OPERATION .................................................................................................................. 13
12.5 HIBERNATION MODE .......................................................................................................................... 13
13.0 Safety Functions ...................................................................................................................................... 13
13.1 INPUT OVER-VOLTAGE PROTECTION .............................................................................................. 13
13.1.1 Normal Operation (Q1 Control) ....................................................................................................... 13
13.1.2 Safety Shunt/Crowbar Operation ..................................................................................................... 14
13.1.3 Standby Shunt Mode ....................................................................................................................... 14
13.1.4 Thermal Crowbar Mode ................................................................................................................... 14
13.1.5 Fast Shunt Operation ...................................................................................................................... 14
13.1.6 Shunt Circuit Parametric Specifications .......................................................................................... 14
13.2 SCHOTTKY ELIMINATION MODE (CHARGER INPUT SHORT CIRCUIT/REVERSE CURRENT PRO-
TECTION) ...................................................................................................................................................... 15
13.3 REVERSE CHARGER PROTECTION .................................................................................................. 15
13.4 OUTPUT CURRENT OVERLOAD PROTECTION (“PTC” MODE) ...................................................... 15
13.5 OUTPUT SHORT CIRCUIT CURRENT PROTECTION ....................................................................... 15
14.0 Required External Components ............................................................................................................... 17
14.1 CHARGE PASS TRANSISTOR (Q1) ....................................................................................................17
14.2 DRIVER TRANSISTOR AND BIAS RESISTORS (R2, R3 AND R5) .................................................... 17
14.3 EXTERNAL CHARGER SENSE RESISTOR (R4) ................................................................................ 17
14.4 CAPACITORS ........................................................................................................................................ 17
14.5 FUSE (F1) ............................................................................................................................................. 17
15.0 Electrical Characteristics .......................................................................................................................... 17
15.1 GENERAL SPECIFICATION AND ABSOLUTE MAXIMUM RATINGS
................................................ 17
15.2 PASS DEVICE AND POWER SUPPLY RATINGS ............................................................................... 18
15.3 IC PIN ELECTRICAL CHARACTERISTICS ......................................................................................... 18
LM3655
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