ADP3806JRU-12.6-RL Analog Devices Inc, ADP3806JRU-12.6-RL Datasheet

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ADP3806JRU-12.6-RL

Manufacturer Part Number
ADP3806JRU-12.6-RL
Description
IC CHARGER LI-ION 12.6V 24-TSSOP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADP3806JRU-12.6-RL

Rohs Status
RoHS non-compliant
Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
13 V ~ 20 V
Operating Temperature
0°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
24-TSSOP (0.173", 4.40mm Width)
Other names
ADP3806JRU-12.6RL
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.
FEATURES
Li-Ion Battery Charger
Three Battery Voltage Options
High End-of-Charge Voltage Accuracy
Programmable Charge Current with Rail-to-Rail
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
Selectable 12.525 V/16.700 V
Selectable 12.600 V/16.800 V
Adjustable
Sensing
0.4% @ 25 C
0.6% @ 5 C to 55 C
0.7% @ 0 C to 85 C
BSTREG
SD
LC
ADP3806
VREF + VREG
CONTROL
AGND
LOGIC
UVLO
BIAS
VCC
BST
REG
VREF
DRVH
BOOTSTRAPPED
SYNCHRONOUS
SD
REF
SW
DRIVER
IN DRVLSD
FUNCTIONAL BLOCK DIAGRAM
DRVL
SYNC
OSCILLATOR
PGND
DRVLSD
+
+
CT
+
+
COMP
V
TH
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 ± 0.6%, the
ADP3806-12.5 guarantees 12.525 V/16.7 V ± 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
g m 1
g m 2
CS+
+
High Frequency Switch Mode
+
AMP1
+
VREF
CS–
Li-Ion Battery Charger
SYS+ SYS–
© 2004 Analog Devices, Inc. All rights reserved.
AMP2
+
2.5V
12.6/16.8
SELECT
BATSEL
ISYS
+
ADP3806
LIMIT
ISET
BAT
www.analog.com

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ADP3806JRU-12.6-RL Summary of contents

Page 1

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 Programmable ...

Page 2

ADP3806–SPECIFICATIONS Parameter Conditions BATTERY SENSE INPUT ADP3806-12.6 V and 16.8 V ADP3806-12.525 V and 16 5∞C £ T 0∞C £ T Input Resistance Part in Operation Input Current Part in Shutdown BATTERY SENSE INPUT ADP3806 V = 2.5 ...

Page 3

Parameter Conditions BATSEL INPUT V = 12.6 V BAT V = 16.8 V BAT BATSEL Input Current BOOST REGULATOR OUTPUT Output Voltage Output Current ANALOG REGULATOR OUTPUT Output Voltage Output Current PRECISION REFERENCE OUTPUT ...

Page 4

... Model ADP3806JRU-REEL ADP3806JRU-REEL7 ADP3806JRU-12.5-RL ADP3806JRUZ-12.5RL ADP3806JRU-12.5-R7 ADP3806JRU-12.6-RL ADP3806JRU-12.6- Pb-free part. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADP3806 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges ...

Page 5

PIN CONFIGURATION VCC SYS– 23 SYS ISYS 5 LIMIT 20 ADP3806 TOP VIEW (Not to Scale) 7 SYNC 18 REG 8 17 REF COMP 11 ...

Page 6

ADP3806–Typical Performance Characteristics –0.5 –0.4 –0.3 –0.2 –0.1 0 0.1 V ACCURACY (%) BAT TPC 1. V Accuracy Distribution BAT 0.4 0.3 0.2 0.1 0 –0.1 –0.2 –0.3 –0 TEMPERATURE ...

Page 7

VCC = 16V 250kHz OSC 500 1000 1500 2000 DRIVER LOAD CAPACITANCE (pF) TPC 7. Supply Current vs. Driver Load Capacitance 1.0 ...

Page 8

ADP3806 100 0.1 1 CHARGE CURRENT (A) TPC 13. Conversion Efficiency vs. Charge Current CHARGE I 92 CHARGE ...

Page 9

THEORY OF OPERATION The ADP3806 combines a bootstrapped synchronous switching driver with programmable current control and accurate final battery voltage control in a constant-current, constant-voltage (CCCV) Li-Ion battery charger. High accuracy voltage control is needed to safely charge Li-Ion batteries, ...

Page 10

ADP3806 Typical values of R range from mW, and the CS input range of ISET is from If, for example charger is required, R could be set to ...

Page 11

The oscillator frequency is set by the external capacitor at the CT pin and the internal current source of 150 mA according to the following formula: m 150 ¥ ¥ OSC ...

Page 12

ADP3806 Shutdown A high impedance CMOS logic input is provided to turn off the ADP3806. When the voltage less than 0.8 V, the ADP3806 is placed in low power shutdown. With the exception of the system current ...

Page 13

For an input voltage and inductance, the maxi- mum rms current is 0. typical ceramic capacitor is a good choice to absorb this current. Input Capacitor Ripple ...

Page 14

ADP3806 0.15 0.05 OUTLINE DIMENSIONS 24-Lead Thin Shrink Small Outline Package [TSSOP] (RU-24) Dimensions shown in millimeters 7.90 7.80 7. 4.50 4.40 4.30 6.40 BSC 1 12 PIN 1 0.65 1.20 BSC MAX 0.30 0.20 SEATING 0.19 PLANE ...

Page 15

Revision History Location 2/04—Data Sheet changed from REV REV. B. Changes to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 16

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