Datasheet LTC4101 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Smart Battery Charger Controller |
| Pages / Page | 30 / 1 — FEATURES. DESCRIPTION. Single Chip Smart Battery Charger Controller. 100% … |
| File Format / Size | PDF / 261 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Single Chip Smart Battery Charger Controller. 100% Compliant (Rev. 1.1) SMBus Support Allows
Model Line for this Datasheet
Text Version of Document
LTC4101 Smart Battery Charger Controller
FEATURES DESCRIPTION
n
Single Chip Smart Battery Charger Controller
The LTC®4101 Smart Battery Charger is a single chip n
100% Compliant (Rev. 1.1) SMBus Support Allows
charging solution that dramatically simplifi es construction
for Operation with or without Host
of an SBS compliant system. The LTC4101 implements n
Up to 4A Charging Current Capability
a Level 2 charger function whereby the charger can be n
High Effi ciency Synchronous Buck Charger
programmed by the battery or by the host. A SafetySignal n
VBAT Optimized 3V to 5.5V
on the battery being charged is monitored for temperature, n SMBus Accelerator Improves SMBus Timing connectivity and battery type information. The SMBus n Hardware Interrupt and SMBAlert Response interface remains alive when the AC power adapter is Eliminate Interrupt Polling removed and responds to all SMBus activity directed to n 0.5V Dropout Voltage; Maximum Duty Cycle > 98% it, including SafetySignal status (via the ChargerStatus n AC Adapter Current Limit Maximizes Charge Rate command). The charger also provides an interrupt to the n ±0.8% Voltage Accuracy; ±4% Current Accuracy host whenever a status change is detected (e.g., battery n 10-Bit DAC for Charge Current Programming removal, AC adapter connection). n 11-Bit DAC for Charger Voltage Programming Charging current and voltage are restricted to chemistry- n User-Selectable Overvoltage and Overcurrent Limits specifi c limits for improved system safety and reliability. n High Noise Immunity SafetySignal Sensor Limits are programmable by two external resistors. Ad- n Available in a 24-Pin SSOP Package ditionally, the maximum average current from the AC adapter is programmable to avoid overloading the adapter
APPLICATIONS
when simultaneously supplying load current and charging n Portable Instruments and Computers current. When supplying system load current, charg- n Data Storage Systems and Battery Backup Servers ing current is automatically reduced to prevent adapter L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear overload. Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6650174, 5723970.
TYPICAL APPLICATION
DCIN 9V to 12V, 2A 0.1μF 6.04k VBAT PART 3V 1.21k < 5.5V LTC4101 TO 5.5V > 5.5V LTC4100 0.1μF 0.05Ω LTC4101 17 5 VDD DCIN 11 4 DCDIV INFET 5k 6 24 CHGEN CHGEN CLP SYSTEM LOAD 10 23 ACP ACP CLN 5μF SMART BATTERY 7 1 0.1Ω 1% SMBALERT TGATE 9 3 24μH SCL BGATE 8 2 SDA PGND 5μF 15 21 THB CSP 16 22 THA BAT 13 18 ILIM VSET 1.13k 14 19 100Ω VLIM ITH 0.03μF 20 12 10k IDC GND 6.04k 0.0015μF 54.9k 0.068μF 0.12μF 0.1μF SMBALERT# SafetySignal SMBCLK SMBCLK SMBDAT SMBDAT 4101 F01a
Figure 1. 1A Smart Battery Charger
4101fa 1
FEATURES DESCRIPTION
n
Single Chip Smart Battery Charger Controller
The LTC®4101 Smart Battery Charger is a single chip n
100% Compliant (Rev. 1.1) SMBus Support Allows
charging solution that dramatically simplifi es construction
for Operation with or without Host
of an SBS compliant system. The LTC4101 implements n
Up to 4A Charging Current Capability
a Level 2 charger function whereby the charger can be n
High Effi ciency Synchronous Buck Charger
programmed by the battery or by the host. A SafetySignal n
VBAT Optimized 3V to 5.5V
on the battery being charged is monitored for temperature, n SMBus Accelerator Improves SMBus Timing connectivity and battery type information. The SMBus n Hardware Interrupt and SMBAlert Response interface remains alive when the AC power adapter is Eliminate Interrupt Polling removed and responds to all SMBus activity directed to n 0.5V Dropout Voltage; Maximum Duty Cycle > 98% it, including SafetySignal status (via the ChargerStatus n AC Adapter Current Limit Maximizes Charge Rate command). The charger also provides an interrupt to the n ±0.8% Voltage Accuracy; ±4% Current Accuracy host whenever a status change is detected (e.g., battery n 10-Bit DAC for Charge Current Programming removal, AC adapter connection). n 11-Bit DAC for Charger Voltage Programming Charging current and voltage are restricted to chemistry- n User-Selectable Overvoltage and Overcurrent Limits specifi c limits for improved system safety and reliability. n High Noise Immunity SafetySignal Sensor Limits are programmable by two external resistors. Ad- n Available in a 24-Pin SSOP Package ditionally, the maximum average current from the AC adapter is programmable to avoid overloading the adapter
APPLICATIONS
when simultaneously supplying load current and charging n Portable Instruments and Computers current. When supplying system load current, charg- n Data Storage Systems and Battery Backup Servers ing current is automatically reduced to prevent adapter L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear overload. Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6650174, 5723970.
TYPICAL APPLICATION
DCIN 9V to 12V, 2A 0.1μF 6.04k VBAT PART 3V 1.21k < 5.5V LTC4101 TO 5.5V > 5.5V LTC4100 0.1μF 0.05Ω LTC4101 17 5 VDD DCIN 11 4 DCDIV INFET 5k 6 24 CHGEN CHGEN CLP SYSTEM LOAD 10 23 ACP ACP CLN 5μF SMART BATTERY 7 1 0.1Ω 1% SMBALERT TGATE 9 3 24μH SCL BGATE 8 2 SDA PGND 5μF 15 21 THB CSP 16 22 THA BAT 13 18 ILIM VSET 1.13k 14 19 100Ω VLIM ITH 0.03μF 20 12 10k IDC GND 6.04k 0.0015μF 54.9k 0.068μF 0.12μF 0.1μF SMBALERT# SafetySignal SMBCLK SMBCLK SMBDAT SMBDAT 4101 F01a
Figure 1. 1A Smart Battery Charger
4101fa 1
