High Frequency Switch Mode
Li-Ion Battery Charger
ADP3806
FEATURES
Li-Ion Battery Charger
Three Battery Voltage Options
Selectable 12.525 V/16.700 V
Selectable 12.600 V/16.800 V
Adjustable
High End-of-Charge Voltage Accuracy
0.4% @ 25 C
0.6% @ 5 C to 55 C
0.7% @ 0 C to 85 C
Programmable Charge Current with Rail-to-Rail
Sensing
System Current Sense with Reverse Input Protection
Soft-Start Charge Current
Undervoltage Lockout
Bootstrapped Synchronous Drive for External NMOS
Programmable Oscillator Frequency
Oscillator SYNC Pin
Low Current Flag
Trickle Charge
APPLICATIONS
Portable Computers
Fast Chargers
GENERAL DESCRIPTION
The ADP3806 is a complete Li-Ion battery-charging IC. The
device combines high output voltage accuracy with constant
current control to simplify the implementation of constant-
current, constant-voltage (CCCV) chargers. The ADP3806 is
available in three options: The ADP3806-12.6 guarantees the
final battery voltage selected is 12.6 V or 16.8 V
卤
0.6%, the
ADP3806-12.5 guarantees 12.525 V/16.7 V
卤
0.6%, and the
ADP3806 is adjustable using two external resistors to set the
battery voltage. The current sense amplifier has rail-to-rail inputs
to accurately operate under low dropout and short-circuit condi-
tions. The charge current is programmable with a dc voltage on
ISET. A second differential amplifier senses the system current
across an external sense resistor and outputs a linear voltage
on the ISYS pin. The bootstrapped synchronous driver allows
the use of two NMOS transistors for lower system cost.
FUNCTIONAL BLOCK DIAGRAM
VCC
BST
DRVH SW
DRVL
PGND
CS+
CS鈥?/div>
SYS+ SYS鈥?/div>
ISYS
BOOTSTRAPPED
SYNCHRONOUS
DRIVER
SD
VREF + VREG
UVLO
BIAS
VREF
IN DRVLSD DRVLSD
+
V
TH
鈥?/div>
+
鈥?/div>
AMP1
鈥?/div>
+
AMP2
鈥?/div>
LIMIT
2.5V
+
BSTREG
鈥?/div>
+
鈥?/div>
SD
LOGIC
CONTROL
鈥?/div>
gm2
+
VREF
SELECT
12.6/16.8
LC
OSCILLATOR
ADP3806
AGND
REG
REF
SYNC
CT
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
+
鈥?/div>
gm1
+
ISET
BAT
COMP
BATSEL
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
漏 2004 Analog Devices, Inc. All rights reserved.
ADP3806相关型号PDF文件下载
-
型号
版本
描述
厂商
下载
-
英文版
100:1, 1000:1 Voltage Probe, Differential 20MHz 78.740" (200...
-
英文版
100:1, 1000:1 Voltage Probe, Differential 100MHz 78.740" (20...
-
英文版
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V and Adju...
AD
-
英文版
Micropower Step-Up/Step-Down Fixed 3.3 V, 5 V, 12 V and Adju...
AD [Analog...
-
英文版
High-Efficiency Notebook Computer Power Supply Controller
AD
-
英文版
High-Efficiency Notebook Computer Power Supply Controller
AD [Analog...
-
英文版
High Efficiency Dual Output Power Supply Controller
AD
-
英文版
High Efficiency Dual Output Power Supply Controller
AD [Analog...
-
英文版
High-Efficiency Notebook Computer Power Supply Controller
AD
-
英文版
High-Efficiency Notebook Computer Power Supply Controller
AD [Analog...
-
英文版
ADP3031: 2MHz PWM Boost Switching Regulator Data Sheet (Rev....
ETC
-
英文版
2 MHz PWM Boost Switching Regulator
AD
-
英文版
2 MHz PWM Boost Switching Regulator
AD [Analog...
-
英文版
TFT LCD Panel Power Module
AD
-
英文版
TFT LCD Panel Power Module
AD [Analog...
-
英文版
200 kHz, 1 A High-Voltage Step-Down Switching Regulator
AD
-
英文版
200 kHz, 1 A High-Voltage Step-Down Switching Regulator
AD [Analog...
-
英文版
500 mA PWM Step-Down DC-DC with Synchronous Rectifier
AD
-
英文版
1 MHz, 750 mA Buck Regulator
AD
-
英文版
1 MHz, 750 mA Buck Regulator
AD [Analog...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
