NCP1835_0603 ONSEMI [ON Semiconductor], NCP1835_0603 Datasheet

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NCP1835_0603

Manufacturer Part Number
NCP1835_0603
Description
Integrated Li−Ion Charger
Manufacturer
ONSEMI [ON Semiconductor]
Datasheet
NCP1835
Integrated Li−Ion Charger
charge 1−cell Li−Ion batteries with a constant current, constant
voltage (CCCV) profile. It can charge at currents of up to 1.0 A.
to maintain regulation without a battery, and its onboard thermal
foldback make it versatile enough to charge from a variety of wall
adapters. The NCP1835 can charge from a standard voltage−source
wall adapter as a CCCV charger, or from a current limited adapter to
limit power dissipation in the pass device.
Features
Typical Applications
© Semiconductor Components Industries, LLC, 2006
May, 2006 − Rev. 4
NCP1835 is an integrated linear charger specifically designed to
Its low input voltage capability, adjustable charge current, ability
Battery
Subsystems
Adapters
Cycle is Completed
Integrated Voltage and Current Regulation
No External MOSFET, Sense Resistor or Blocking Diode Required
Charge Current Thermal Foldback
Integrated Pre−charge Current for Conditioning Deeply Discharged
Integrated End−of−Charge (EOC) Detection
1% Voltage Regulation
4.2 V or 4.242 V Regulated Output Voltage
Regulation Maintained without a Battery Present
Programmable Full Charge Current 300 − 1000 mA
Open−Drain Charger Status and Fault Alert Flags
2.8 V Output for AC Present Indication and Powering Charging
Minimum Input Voltage of 2.4 V Allows Use of Current Limited
Automatically Recharging if Battery Voltage Drops after Charging
Low Profile 3x3 mm DFN Package
Pb−Free Packages are Available
Cellular Phones
PDAs, MP3 Players
Stand−Alone Chargers
Battery Operated Devices
1
See detailed ordering and shipping information in the package
dimensions section on page 15 of this data sheet.
1835 = Device Code
4200 = 4.2 V
4242 = 4.242 V
A
L
Y
W
G
(Note: Microdot may be in either location)
TIMER
FAULT
CFLG
GND
MN SUFFIX
CASE 485C
V
ORDERING INFORMATION
CC
DFN 3x3
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
http://onsemi.com
1
2
3
4
5
(Top View)
DFN 3x3
Publication Order Number:
10
9
8
7
6
1
1
DIAGRAMS
MARKING
BAT
VSNS
ISEL
V2P8
EN
NCP1835/D
ALYWG
ALYWG
1835
4200
1835
4242
G
G

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NCP1835_0603 Summary of contents

Page 1

NCP1835 Integrated Li−Ion Charger NCP1835 is an integrated linear charger specifically designed to charge 1−cell Li−Ion batteries with a constant current, constant voltage (CCCV) profile. It can charge at currents 1.0 A. Its low input voltage capability, ...

Page 2

4 GND PIN FUNCTION DESCRIPTION Pin Symbol Input Supply Voltage. Provides power to the charger. This pin should be bypassed with at least a 4.7 mF ceramic capacitor to ground. ...

Page 3

V CC Startup, Control & Clamp V2P8 V2P8 VCC Resistor Bias Circuits Dividers VREF CFLG FAULT MAXIMUM RATINGS Rating Supply Voltage Status Flag Output Pins Voltage Range for Other Pins Current Out from BAT Pin Thermal Characteristics Thermal Resistance, Junction−to−Air ...

Page 4

ELECTRICAL CHARACTERISTICS are guaranteed over 0°C to 70°C with a supply voltage in the range of 4 6.5 V, unless otherwise noted.) Characteristic V SUPPLY CC Operating Supply Range Rising V Threshold CC Falling V Lockout Threshold CC ...

Page 5

TYPICAL OPERATING CHARACTERISTICS 4.30 4.242 V 4.25 4.20 4.2 V 4. ISEL 4.00 0 0.2 0.4 0 CHARGE CURRENT (A) CHG Figure 3. Regulated Output Voltage vs. ...

Page 6

TYPICAL OPERATING CHARACTERISTICS 3.0 2.5 2.0 1.5 1.0 0.5 0.0 3.7 3.9 4.1 4.3 4.5 4.7 4 INPUT VOLTAGE (V) CC Figure 8. V2P8 Voltage vs. Input Voltage 120 110 100 ...

Page 7

Overview Rechargeable Li−Ion/Polymer batteries are normally charged with a constant current (CC) until the terminal voltage reaches a fixed voltage threshold, at which point a constant voltage (CV) is applied and the current drawn by the battery decays. The charging ...

Page 8

Power Up V > POR N Y POR Initialization Reset Counter Trickle Charge V > SNS 1/8 TIMEOUT? Constant Y Trickle Current Charge Charge Set FAULT Low Latch Up Charger N ...

Page 9

Trickle Charge RISE V BAT charge I PC CFLG FAULT V2P8 0 Table 1. Charge Status Condition Trickle, Constant Current and Constant Voltage Charge End−of−Charge or Shutdown Mode Timeout Fault, V < 0.35 V ...

Page 10

Charge Status Indicator (CFLG) CFLG is an open−drain output that indicates battery charging or End−of−Charge (EOC) status pulled low when charging in constant current mode and constant voltage mode. It will be forced to a high impedance state ...

Page 11

Input and Output Capacitor Selection A 4 higher value ceramic capacitor is recommended for the input bypass capacitor. For the output capacitor, when there is no battery inserted and the NCP1835 is used as an LDO with 4.2 ...

Page 12

The following Table 3 shows the desired TIMEOUT vs. C sizes. The C is required for proper device TIME TIME operation. Table 3. TIMEOUT vs. C Size TIME C (nF) TIMEOUT (minute) TIME 0.47 1 5.6 8 ...

Page 13

PCB Layout Recommendations The recommended footprint for the 3x3 mm DFN package is included on the Package Dimension page critical that the exposed metal pad is properly soldered to the ground copper area and then connected to a ...

Page 14

NCP1835 Figure 23. Silkscreen Layer Figure 24. Top Layer Figure 25. Bottom Layer http://onsemi.com 14 ...

Page 15

Table 4. Bill of Materials Item Qty. Part Description 1 1 NCP1835 Integrated Li−Ion Charger (DFN−10) Chip Resistor " (0603 Chip Resistor "1% 160 kW (0603 Chip Resistor "1% 100 kW (0603 ...

Page 16

D Ç Ç Ç PIN 1 Ç Ç Ç REFERENCE Ç Ç Ç 0. TOP VIEW 0. (A3) DETAIL B 0.10 C 0.08 C 10X SIDE VIEW 10X 10X 10 ...

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