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NCP3800V
SMBus Level 2 Battery
Charger
The NCP3800V is a highly integrated Lithiumion battery charger
controller which can be programmed via the SMBus. It can be used to
charge smart batteries and includes three loops for output voltage,
output current and input current. External switch FETs are driven by
internal charge pump drivers.
Features
High Efficiency Current Sense Circuit
Level 2 SMBus Controlled
2/3/4 Cell Li+ Battery
25 Volt Maximum Adapter Input Range
5.4 V Charge Pump Driving External Nchannel FET Switches
Internal Loop Compensation
Highly Accurate Regulation
±0.5% Charge Voltage Accuracy
±3.5% Charge Current Accuracy
±3.5% Adaptor Current Accuracy
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Typical Applications
Notebook Computers
Netbook Computers
Tablet PCs
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QFN20
MN SUFFIX
CASE 485CP
MARKING DIAGRAM
XXXXX
XXXXX
ALYWG
G
XXXXX = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
(Note: Microdot may be in either location)
PIN CONFIGURATION
CSSN
CSSP
FETCS
ACFET
ACOK
1
LGATE
GND
CSOP
CSON
BATFET
© Semiconductor Components Industries, LLC, 2013
April, 2013 Rev. 0
(Top View)
ORDERING INFORMATION
Device
NCP3800VMNTXG
Package
QFN20
(PbFree)
Shipping
3000 / Tape &
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
1 Publication Order Number:
NCP3800V/D

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NCP3800V
Host
Vb max
Iomax
Ismax
Figure 1. System Diagram
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NCP3800V
Table 1. FUNCTIONAL PIN DESCRIPTION
Function
Pin
Description
ACOK
5 An open drain device indicates that status of the ac adaptor. Connecting a 10 kW resistor to external
pullup power supply. A high state indicates the adaptor is present.
ACFET
4 Gate drive to the series NFET(s) from the ac adaptor to the system
ACIN
6 This Input detects the presence of the ac adaptor which is scaled by a voltage divider to determine if the
adaptor is present and whether its output voltage is in the correct range for proper operation.
BOOT
17 The bootstrap pin connects to diode and capacitor to provide the drive to the upper gate.
CSON
12 The negative side of the output (charge) current sense resistor is connected to this node. This pin also
plays the role of battery pack voltage sensing.
CSOP
13 The positive side of the output (charge) current sense resistor is connected to this node.
CSSN
1 The negative side of the input (adapter) current sense resistor is connected to this node.
CSSP
2 The positive side of the input (adapter) current sense resistor is connected to this node.
DCIN
20 This pin is the DC input to the chip. It provides bias power for the chip and also for the internal LDO.
GND
14 This is the ground reference pin for the chip.
ICM 7 The input current monitor provides a voltage signal that is the equivalent total input current or charge
current drop across the sense resistor multiplied by a ratio programmed through ChargeOption() register.
FETCS
3 Common source pin of the series FET(s) from the AC adaptor to the system and charging circuit
LGATE
15 This pin provides the gate drive for the lower FET (synchronous rectifier) gate
PGND
PAD This pin is the ground reference for the gate drive circuit.
PHASE
19 This pin connects to the switch node
SCL 9 This pin is an opendrain output for the SMBus Data I/O. An external pullup resistor should be connec-
ted according to SMBus specifications.
SDA
8 This pin is the SMBus Clock Input. An external pullup resistor should be connected according to SMBus
specifications.
UGATE
18 This pin provides the gate drive for the upper FET (switch) gate.
BATFET
11 Gate drive to the external NFET connecting the battery to the system rail
VDDP
16 This is the regulated supply for the switch drive. It should be bypassed with a >0.1 mF ceramic capacitor.
NC 10 Not connected. Recommended to be grounded.
Table 2. MAXIMUM RATINGS
Rating
Symbol
Value
Unit
DCIN, CSSP, CSSN, CSOP, CSON, FETCS to GND
PHASE
ACFET, UGATE, BOOT, BATFET to GND
All other pins
Vmax
0.3 to 30
2.0 to 30
0.3 to 36
0.3 to 6.5
V
Thermal Resistance, JunctiontoAir
qJA 45 °C/W
Operating junction temperature range
Tj
0 to 125
°C
Ambient temperature range
TA
10 to 100
°C
Nonoperating junction temperature range
Tj
55 to 150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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ACIN
GND
DCIN
NC
NCP3800V
ACOK ACFET
FETCS
CSSP CSSN UGATE
BOOT LGATE
PHASE
CSOP CSON BATFET
Av = 20
Charge
Pump I
TMode
Q
S
Osc Ramp
Charge
Pump II
v2p0
Ismax
Latch
CSErr
Q
R
Mode
Logic
TMode
a * Ismax
CSErr
v2p0
0.25
Av = 20
CCErr
v2p0
Iomax
CVErr
v2p0
Vbmax
LDO
BOOT
VDDP
ICM
gm v2p0
v2p0
Figure 2. Chip Block Diagram
SMBus
Interface
TMode
SDA SCL
Table 3. ELECTRICAL CHARACTERISTICS
(Unless otherwise noted: DCIN = 20.0 volts, TJ = 0°C to +125°C, Rss = Rso = 10 mW)
Characteristics
Symbol
OPERATING CONDITIONS
DCIN operating range
CHARGING VOLTAGE
4.2 V/Cell
(ChargeVoltage() = 0x41A0H)
4 Cells
4.2 V/Cell
(ChargeVoltage() = 0x3130H)
3 Cells
4.2 V/Cell
(ChargeVoltage() = 0x20D0H)
CHARGING CURRENT
ChargeCurrent()=0x1000H, 10 mW
ChargeCurrent()=0x080H, 10 mW (Note 1)
ADAPTOR INPUT CURRENT
InputCurrent()=0x1000H, 10 mW
InputCurrent()=0x0200H, 10 mW (Note 1)
CURRENT SENSE DIFF AMPS
Voltage Gain (input within ±100 mV)
Input offset voltage (Note 1)
Common mode input range
1. Guaranteed by design
2 Cells
AV
Ios
Vicom
Min
7
16.716
0.5
12.529
0.5
8.350
0.6
39.53
3.5
0.64
50.0
39.53
3.5
3.84
25.0
1
7
Typ
16.800
12.592
8.400
40.96
1.28
40.96
5.12
20
Max Unit
25 V
16.884
0.5
12.655
0.5
8.450
0.6
V
%
V
%
V
%
42.39
3.5
1.92
50.0
mV
%
mV
%
42.39
3.5
6.4
25.0
mV
%
mV
%
V/V
1 mV
25 V
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NCP3800V
Table 3. ELECTRICAL CHARACTERISTICS
(Unless otherwise noted: DCIN = 20.0 volts, TJ = 0°C to +125°C, Rss = Rso = 10 mW)
Characteristics
Symbol
ICM OUTPUT
ICM output voltage range
ICM output current
ChargeOption()bit9=0, current sense amplifier gain
ChargeOption()bit9=1, current sense amplifier gain
ChargeOption()bit5=0, adaptor current
ChargeOption()bit5=1, charge current
ICM accuracy (Input referred)
ICM accuracy (ChargeCurrent()=0x1000H, 10 mW)
PWM & ERROR AMPLIFIERS
Oscillator Frequency
GATE DRIVE SUPPLY (VDDP)
Output Voltage (Iout = 50 mA)
Output Current (Note 1)
Vddp
Ivddp
Capacitor required for stability (Note 1)
Cvddp
GATE DRIVERS
Lower Gate Drive Source Impedance, 10 mA
R_lgsrc
Lower Gate Drive Sink Impedance, 10 mA
R_lgsnk
Upper Gate Drive Source Impedance, 10 mA
R_ugsrc
Upper Gate Drive Sink Impedance, 10 mA
R_ugsnk
Driver Dead Time, 10 mA
Td
ACFET GATE DRIVER (Charge Pump)
Charge up rising time, 10 nF cap
Gate driver voltage
Vacfet
Gate driver turnoff resistance
BATFET GATE DRIVER (Charge Pump)
Charge up rising time, 10 nF cap
Gate driver voltage
Vacfet
Gate driver turnoff resistance
ACIN COMPARATOR AND ACOK
ACIN Adaptor Detect, Rising Threshold
ACIN Adaptor Detect, Falling Hysteresis
ACIN wakeup threshold rising threshold
ACIN wakeup threshold falling hysteresis
ACOK Rising Delay (deglitch time, default)
ACOK Voltage Drop (Low state, Isink = 1 mA)
ACOK Leakage Current (Open drain, 3.3 V)
(ACOK deglitch time can be programmable by ChargeOption()bit15)
1. Guaranteed by design
Min Typ Max Unit
5.5 V
1 mA
20
40
1.2
3
1.2 mV
3%
750 kHz
5.2 5.4 5.6 V
40 mA
0.1 4.7 mF
8 12 W
0.9 1.5 W
6 12 W
0.65 1.3 W
20 ns
1.8
5.0
9
3 ms
V
kW
1.8
5.0
9
3 ms
V
kW
1.96 2.00 2.04
50
0.63
0.05
100 175
250 400
0.5
0: 175 ms(default);1: 1.4s
V
mV
V
V
ms
mV
mA
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