SC802IMLTRT Semtech, SC802IMLTRT Datasheet

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SC802IMLTRT

Manufacturer Part Number
SC802IMLTRT
Description
IC, BATTERY CHARGER, 1A, MLPQ-16
Manufacturer
Semtech
Datasheet

Specifications of SC802IMLTRT

Battery Type
Li-Ion, Li-Polymer
Input Voltage
14V
Battery Charge Voltage
4.2V
Charge Current Max
1A
Battery Ic Case Style
MLPQ
No. Of Pins
16
No. Of Series Cells
1
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SC802IMLTRT
Manufacturer:
RICHTEK
Quantity:
1 222
POWER MANAGEMENT
Features
Applications
Typical Application Circuit
October 30, 2008
Integrated charger with pass FET, reverse-blocking
diode, sense resistor, timer, and thermal protection
Battery Voltage — 4.1V, 4.2V, and adjustable
Programmable pre-charge, fast-charge, & termina-
tion current
Battery voltage controlled to 1% accuracy
Soft-start for glitch-free adaptor plug-in
Continuous charge current — Up to 1.5A
Charge current monitor output for microcontroller or
ADC interface
Input voltage range — 4.3V to 14V
Battery Drain when not charging — 0.1μA
Operates without a battery in regulated LDO mode
Small 4 x 4(mm) 16 lead MLPQ package
NTC thermistor sense input
Adjustable up to 6 Hour programmable charge timer
Over-current protection in all charging states
Over-voltage protection
Remote Kelvin sensing at the battery terminals
ADC input current control capable
Status output for charging and end of charge cycle
Charges Li-Ion, Li-Polymer, NiCd, and NiMH Batteries
Cellular phones and PDA’s
Handheld meters
Charging stations
Handheld computers
Digital cameras
Programmable current source
CHARGER VIN
C
VCC
1μF
Thermistor
R
Battery
NPU
R
NTC
R
IPRGM
R
ITERM
© 2008 Semtech Corporation
VCC1
VCC2
IPRGM
EN_NTC
ITERM
BIPB
GND
RFGND
SC802/SC802A
AFC I
SET
Battery Charger System with Timer
VPRGM
CHRGB
VOUT1
VOUT2
RTIME
BSEN
CPB
Description
The SC802 and SC802A are fully integrated, single cell,
constant-current/constant-voltage Lithium-Ion/Lithium
Polymer battery chargers. With an integrated timer and
complete charge control algorithm, the devices are opti-
mized for stand-alone charger applications. They provide
for programmable pre-charge, fast-charge, and termina-
tion current settings. The devices can be programmed to
terminate the charge cycle based on the output current or
the time-out of the programmable timer. The fast-charge
current is typically set with an external resistor but can be
modified with the analog fast-charge input to allow a
Power Management Controller to control the fast-charge
current setting via DAC.
The 14V input voltage range of the SC802 and SC802A
eliminates additional protection circuitry required by
other 5V chargers in the event of faulty adapters.
Reference ground and battery sense inputs are provided
to allow Kelvin connections, to eliminate errors due to I×R
voltage drops during charging.
The output voltage to the battery is controlled to within
1% of the programmed voltage for either 4.1V or 4.2V. The
SC802 and SC802A can also function as a general purpose
current sources, such as for charging nickel-cadmium
(NiCd) and nickel-metal-hydride (NiMH) batteries.
The SC802A version of the device is optimized for high
termination current applications.
AFC
Fully Integrated Lithium-Ion
BAT.
2.2μF
C
VOUT
SC802/SC802A
R
RTIME
CHARGE
CHARGER
PRESENT
1

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SC802IMLTRT Summary of contents

Page 1

... The SC802A version of the device is optimized for high termination current applications. SC802/SC802A CPB VCC1 CHRGB VCC2 RTIME IPRGM EN_NTC VPRGM ITERM BSEN BIPB VOUT1 VOUT2 GND RFGND AFC R ITERM AFC I SET © 2008 Semtech Corporation SC802/SC802A CHARGE BAT. R RTIME C VOUT 2.2μF CHARGER PRESENT 1 ...

Page 2

... ITERM MLP-16, 4x4, 16 LEAD θ = 50°C/W JA Marking Information 802 yyww yyww = datecode Ordering Information Device SC802IMLTRT SC802AIMLTRT 13 SC802EVB 12 RTIME SC802AEVB Notes: 11 CPB (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Available in lead-free package only. Device is WEEE and RoHS 10 CHRGB compliant. ...

Page 3

... CV-HI VPRGM VCC CV_LO VPRGM VOUT_ RGND VOUT_RGND VOUT CVn REFGND REFGND © 2008 Semtech Corporation SC802/SC802A (1)(3) ( 4.3 < V < 85°C, unless specifi ed. A Min Typ 3.7 4.0 40 6.5 6.8 6.1 6.5 200 300 2 4.5V 0.1 BSEN 4.16 4 ...

Page 4

... RTIME INTTS V RTIME tied through 36.5kΩ to GND RTIME RTIME tied through 36.5kΩ to GND T PreQF RTIME tied to VCC RTIME tied through 36.5kΩ to GND T QCOMP RTIME tied to VCC © 2008 Semtech Corporation SC802/SC802A Min Typ 3.0 = 0.1V 0 250 ...

Page 5

... V VIN , whether 4.1V or 4.2V fi xed, or Adjust Mode measured at BSEN. For either of the fi xed output voltage settings compared to the Adjust Mode feedback voltage, V BSEN / V . BSEN-FDBK © 2008 Semtech Corporation SC802/SC802A Min Typ 0.5 0.5 1.8 = 5.00V, unless noted. is compared directly to BSEN ...

Page 6

... Battery Charge Profi le V VOUT I VOUT V CHRGB 75 100 125 t (minutes) © 2008 Semtech Corporation SC802/SC802A Output Current (SC802) versus TERM 1.5 2.5 4.5 6 8.5 10 3.5 Ω ITERM Time-out versus Output R RTIME T QCOMP T PreQ Ω ...

Page 7

... Charger output — Connect to battery and to VOUT2. Charger output — Connect to battery and to VOUT1. Pad is for heatsinking purposes — The thermal pad is pad to ground plane using multiple vias. © 2008 Semtech Corporation SC802/SC802A and 0.75×V enable the NTC function. VCC ...

Page 8

... VPRGM Detect 16 Over Temp GND 6 Under Voltage Over Voltage BIPB 8 Programmable NTC EN-NTC 7 Interface RTIM 12 CPB 11 CHRGB 10 BSEN 1 Pre-charge Ref Pre-Charge On Fast Charge On Control Charge/LDO On Timer GND © 2008 Semtech Corporation SC802/SC802A VCC Fast Charge Ref ITERM VOUT VOUT IPRGM ITERM 8 ...

Page 9

... The fast-charge current can be set to a maximum of 1.5A and is selected by the program resistor on the IPRGM pin. The voltage on this pin represents the current through the battery. It enables a microprocessor via an Analog-to-Digital Converter (ADC) to monitor battery current by sensing the voltage © 2008 Semtech Corporation SC802/SC802A ...

Page 10

... The recommended EN_NTC network is a fixed-value pullup resistor (designated R the VCC pins, and the battery pack NTC thermistor (desig- nated R ) from the EN_NTC pin to ground. In this con- NTC fi guration, shown in the Typical Application Circuit on © 2008 Semtech Corporation SC802/SC802A BIPB Timer I VOUT High ...

Page 11

... For detailed design guidance for ratiometric NTC inter- ×V indicates the VCC faces, including thermistor selection guidelines, see the Semtech Application Note AN–PM–0801, NTC Thermistor Network Design for Ratiometric Thresholds. Status Indicators Range There are two status indicator outputs on the SC802/A — ...

Page 12

... EN_NTC VPRGM BSEN ITERM BIPB VOUT1 VOUT2 GND RFGND AFC R ITERM AFC I SET Figure 1. V Adjust Mode programming. CV © 2008 Semtech Corporation SC802/SC802A Fault CPB VCC UVLO or OFF VCC OVP NTC Fault > 150ºC OFF Adjust Mode the CV regula- CV CHARGE R ADJ-LO ...

Page 13

... Capacitance must be evaluated at the expected bias voltage (V supply regulation voltage for C volt capacitance rating. © 2008 Semtech Corporation SC802/SC802A . When the device is in LDO mode (BIPB = VOUT for C ...

Page 14

... TERM Yes CHRGB High Z Timer ? Enabled? Yes Yes t > QCOMP Float Charge Mode VOUT CV © 2008 Semtech Corporation SC802/SC802A Shutdown Mode VOUT off CHRGB High Z CPB Low CC = Constant Current CV = Constant Voltage Timer Yes Enabled? Yes Start Timer Start Pre-Charge Yes V > VT ...

Page 15

... LDO Mode Timing Diagram UVLO VCC 2.8V VOUT Fast Charge IOUT Soft Start CC-mode CPB CHRGB TIMER (Disabled) NTC Re-Charge Termination Threshold Current CV- mode On Off On Re-Charge Termination Threshold Current CV-mode Load Current Transient On Off Off © 2008 Semtech Corporation SC802/SC802A On Off On Hold On Fault On Fault 15 ...

Page 16

... VCC2 CHRGB 12 3 IPRGM RTIM 2 7 EN_NTC VPRGM 4 1 ITERM BSEN 8 15 BIPB VOUT1 6 16 GND VOUT2 5 9 RFGND AFC R4 3.01k © 2008 Semtech Corporation SC802/SC802A TP6 AFC 1 2 JP1 1 JP2 4.2V TINT R2 2 100k JP4 No 4.1V Pop 37.5k No Pop TP4 ...

Page 17

... NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS SEATING PLANE C D1 LxN E/2 N bxN bbb C A D/2 © 2008 Semtech Corporation SC802/SC802A DIMENSIONS INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM - - A .031 .039 0. .000 ...

Page 18

... DIM Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804 www.semtech.com © 2008 Semtech Corporation SC802/SC802A DIMENSIONS INCHES MILLIMETERS (.148) (3.75) .106 2.70 .091 2.30 .091 2.30 .026 0.65 .016 0.40 .041 1.05 ...

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