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ADP3806JRU 데이터시트 PDF




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부품번호 ADP3806JRU 기능
기능 High-Frequency Switch Mode Li-Ion Battery Charger
제조업체 Analog Devices
로고 Analog Devices 로고


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ADP3806JRU 데이터시트, 핀배열, 회로
a
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 55ЊC
؎0.7% @ 0؇C to 85؇C
Programmable Charge Current with Rail-to-Rail
Sensing
System Current Sense with Reverse Input Protection
Softstart 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
High-Frequency Switch Mode
Li-Ion Battery Charger
ADP3806
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 be selected to 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 drop out and short circuit
conditions. 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.
BSTREG
SD
LC
FUNCTIONAL BLOCK DIAGRAM
VCC BST DRVH SW DRVL PGND
CS+ CS–
SYS+ SYS–
ISYS
VREF + VREG
UVLO
BIAS
BOOTSTRAPPED
SYNCHRONOUS
DRIVER
SD
VREF
IN DRVLSD DRVLSD
–+
–+
+
LOGIC
CONTROL
+–
AMP1
VTH
gm1
+
ADP3806
OSCILLATOR
gm2
+
VREF
–+
AMP2
2.5V
+
SELECT
12.6/16.8
LIMIT
ISET
BAT
AGND
REG REF SYNC
CT
COMP
BATSEL
REV. 0
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.
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
© Analog Devices, Inc., 2001




ADP3806JRU pdf, 반도체, 판매, 대치품
ADP3806
ABSOLUTE MAXIMUM RATINGS*
PIN FUNCTION DESCRIPTIONS
Input Voltage (VCC) . . . . . . . . . . . . . . . . . . . –0.3 V to +25 V
BAT, CS+, CS– . . . . . . . . . . . . . . . . . . –0.3 V to VCC +0.3 V
SYS+, SYS– . . . . . . . . . . . . . . . . . . . . . . . . . . . –25 V to +25 V
Pin
No.
Mnemonic Function
BST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +30 V 1
VCC
Supply Voltage
BST to SW . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +8 V
SW to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . –4 V to +25 V
DRVL to PGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +8 V
ISET, BATSEL, SD, SYNC, CT,
LIMIT, ISYS, LC . . . . . . . . . . . . . . . . . . . . –0.3 V to +10 V
COMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +3 V
GND to PGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
Operating Ambient Temperature Range . . . . . . 0°C to 100°C
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115°C/W
Operating Junction Temperature Range . . . . . . 0°C to 125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range (Soldering 10 sec) . . . . . . . . . 300°C
*This is a stress rating only, operation these limits can cause the device to be
permanently damaged. Unless otherwise specified, all voltages are referenced to
GND. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
2
3
4
5
6
7
8
9
10
11
12
13
14
SYS–
SYS+
ISYS
LIMIT
CT
SYNC
REG
REF
SD
COMP
LC
AGND
BAT
Negative System Current Sense Input
Positive System Current Sense Input
System Current Sense Output
System Current Sense Limit Output
Oscillator Timing Capacitor
Oscillator Synchronization Pin
6.0 V Analog Regulator Output
2.5 V Precision Reference Output
Shutdown Control Input
External Compensation Node
Low Current Output
Analog Ground
Battery Sense Input.
2.5 V for ADP3806,
ORDERING GUIDE
12.525 V/16.7 V for ADP3806-12.5,
or 12.6 V/16.8 V for ADP3806-12.6
Model
ADP3806JRU
ADP3806JRU-12.5
ADP3806JRU-12.6
Battery
Voltage
Adjustable
12.525 V/
16.7 V
12.600 V/
16.8 V
Package
Description
TSSOP-24
TSSOP-24
TSSOP-24
Package
Option
RU-24
RU-24
RU-24
15 BATSEL Battery Voltage Sense Input
High = 3 Cells, Low = 4 Cells
16 ISET
Charge Current Program Input
17 CS–
Negative Current Sense Input
18 CS+
Positive Current Sense Input
19 PGND
Power Ground
20 DRVL
Low Drive Output switches between
REG and PGND
21 BSTREG 7.0 V Regulator Output for Boost
PIN CONFIGURATION
24-Lead TSSOP
22 BST
23 DRVH
Floating Bootstrap Supply for DRVH
High Drive Output switches between
SW and BST
VCC 1
SYS2
24 SW
23 DRVH
24 SW
Buck Switching Node Reference
for DRVH
SYS+ 3
22 BST
ISYS 4
21 BSTREG
LIMIT 5 ADP3806 20 DRVL
CT 6 TOP VIEW 19 PGND
SYNC 7 (Not to Scale) 18 CS+
REG 8
17 CS
REF 9
16 ISET
SD 10
15 BATSEL
COMP 11
14 BAT
LC 12
13 AGND
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. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4– REV. 0

4페이지










ADP3806JRU 전자부품, 판매, 대치품
100
98
96
94
92
90
88
VCC = 19V
86 VBAT = 12.4V
TA = 25؇C
84 FIGURE 1
82
80
0.1
1
CHARGE CURRENT Amps
10
TPC 13. Conversion Efficiency vs. Charge Current
96
94 ICHARGE = 2A
92 ICHARGE = 3A
90
88
86
VCC = 19V
84 TA = 25؇C
FIGURE 1
82
3 4 5 6 7 8 9 10 11 12 13
VBAT V
TPC 14. Conversion Efficiency vs. Battery Voltage
ADP3806
1.00
0.95
0.90
19VIN 0؇C
0.85
0.80
19VIN 85؇C
0.75
0.70
2 4 6 8 10 12 14
VO
TPC 15. Conversion Efficiency vs. Battery Voltage at
Temperatures
REV. 0
–7–

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