ADP3820ARTZ-4.2RL7 Analog Devices Inc, ADP3820ARTZ-4.2RL7 Datasheet

IC CHARGER LI-ION 4.2V SOT-23-6

ADP3820ARTZ-4.2RL7

Manufacturer Part Number
ADP3820ARTZ-4.2RL7
Description
IC CHARGER LI-ION 4.2V SOT-23-6
Manufacturer
Analog Devices Inc
Type
Battery Chargerr
Datasheet

Specifications of ADP3820ARTZ-4.2RL7

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
4 V ~ 15 V
Operating Temperature
-20°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SOT-23-6
Output Current
1mA
Output Voltage
4.2V
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
15V
Operating Temp Range
-20C to 85C
Package Type
SOT-23
Mounting
Surface Mount
Pin Count
6
Operating Temperature Classification
Commercial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADP3820ARTZ4.2RCT

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADP3820ARTZ-4.2RL7
Manufacturer:
TI
Quantity:
7 080
Part Number:
ADP3820ARTZ-4.2RL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
GENERAL DESCRIPTION
The ADP3820 is a precision single cell Li-Ion battery charge
controller that can be used with an external Power PMOS de-
vice to form a two-chip, low cost, low dropout linear battery
charger. It is available in two voltage options to accommodate
Li-Ion batteries with coke or graphite anodes. The ADP3820’s
high accuracy ( 1%) low shutdown current (1 A) and easy
charge current programming make this device especially attrac-
tive as a battery charge controller.
Charge current can be set by an external resistor. For example,
50 m of resistance can be used to set the charge current to
1 A. Additional features of this device include foldback current
limit, overload recovery, and a gate-to-source voltage clamp to
protect the external MOSFET. The proprietary circuit also
minimizes the reverse leakage current from the battery if the
input voltage of the charger is disconnected. This feature elimi-
nates the need for an external serial blocking diode.
The ADP3820 operates with a wide input voltage range from
4.5 V to 15 V. It is specified over the industrial temperature
range of –20 C to +85 C and is available in the ultrasmall
6-lead surface mount SOT-23-6 and 8-lead SOIC packages.
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
630 A Typical Quiescent Current
Shutdown Current: 1 A (Typical)
Stable with 10 F Load Capacitor
4.5 V to 15 V Input Operating Range
Integrated Reverse Leakage Protection
6-Lead SOT-23-6 and 8-Lead SO-8 Packages
Programmable Charge Current
–20 C to +85 C Ambient Temperature Range
Internal Gate-to-Source Protective Clamp
APPLICATIONS
Li-Ion Battery Chargers
Desktop Computers
Hand-Held Instruments
Cellular Telephones
Battery Operated Devices
1% Total Accuracy
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
+5V
V
IN
10k
Figure 1. Li-Ion Charger Application Circuit
R1
10 F
FUNCTIONAL BLOCK DIAGRAM
SD
C1
V
+
ADP3820
REF
World Wide Web Site: http://www.analog.com
50m
V
SD
R
IN
S
ADP3820-xx
IS
BIAS
GND
Battery Charger
GND
NDP6020P
GATE
V
50mV
OUT
© Analog Devices, Inc., 1999
+
Lithium-Ion
ADP3820
I
O
V
IS
GATE
V
22 F
= 1A
IN
OUT
Li-Ion
BATTERY
V
OUT

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ADP3820ARTZ-4.2RL7 Summary of contents

Page 1

FEATURES 1% Total Accuracy 630 A Typical Quiescent Current Shutdown Current (Typical) Stable with 10 F Load Capacitor 4 Input Operating Range Integrated Reverse Leakage Protection 6-Lead SOT-23-6 and 8-Lead SO-8 Packages Programmable ...

Page 2

ADP3820–SPECIFICATIONS Parameter INPUT VOLTAGE OUTPUT VOLTAGE ACCURACY QUIESCENT CURRENT Shutdown Mode Normal Mode GATE TO SOURCE CLAMP VOLTAGE GATE DRIVE MINIMUM VOLTAGE GATE DRIVE CURRENT (SINK/SOURCE GAIN V OUT CURRENT LIMIT THRESHOLD VOLTAGE LOAD REGULATION LINE REGULATION SD ...

Page 3

PIN FUNCTION DESCRIPTIONS Pin Pin SOT-23-6 SO-8 Name Function Shutdown. Pulling this pin low will disable the output GND Device Ground. This pin should be tied to system ground closest to the load ...

Page 4

Performance Characteristics ADP3820 4.110 V = 5.1V IN 4.105 4.100 4.095 4.090 0 200 400 600 I – mA LOAD Figure 2. V vs. I OUT LOAD 4.110 LOAD 4.105 4.100 4.095 4.090 ...

Page 5

10mA LOAD 1.000 0.900 0.800 0.700 0.600 0.500 0 –40 –20 20 TEMPERATURE – C Figure 8. Quiescent Current vs. Temperature* 4 10mA LOAD 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ...

Page 6

ADP3820 APPLICATION INFORMATION The ADP3820 is very easy to use. A P-channel power MOS- FET and a small capacitor on the output is all that is needed to form an inexpensive Li-Ion battery charger. The advantage of using the ADP3820 ...

Page 7

The current sense resistor for this application 0.05/0.5 = 100 FET Selection The type and size of the pass transistor are determined by the threshold voltage, input-output voltage differential and load ...

Page 8

ADP3820 PCB Layout Issues For optimum voltage regulation, place the load as close as pos- sible to the device’s V and GND pins recommended to OUT use dedicated PCB traces to connect the MOSFET’s drain to the positive ...

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