SC1410ACQSTRT Semtech, SC1410ACQSTRT Datasheet

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SC1410ACQSTRT

Manufacturer Part Number
SC1410ACQSTRT
Description
IC, BATTERY CHARGER, 1.5A, QSOP-16
Manufacturer
Semtech
Datasheets

Specifications of SC1410ACQSTRT

Battery Type
Li-Ion, NiCd, NiMH
Input Voltage
18V
Battery Charge Voltage
8V
Charge Current Max
1.5A
Battery Ic Case Style
QSOP
No. Of Pins
16
No. Of Series Cells
1
Output Current
1.5A
Output Voltage
2 to 18V
Operating Supply Voltage (min)
7V
Operating Temp Range
0C to 70C
Package Type
QSOP
Mounting
Surface Mount
Pin Count
16
Operating Temperature Classification
Commercial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The SC1410A is designed to provide a simple, fast charg-
ing solution for rechargeable batteries that require con-
stant-current and/or constant voltage charging, including
nickel-cadmium (NiCd), nickel-metal-hydride (NiMH) and
lithium-ion (Li-Ion). With a voltage reference accuracy of
0.5% the SC1410A satisfies the tight constant-voltage
charging requirements of lithium cells.
The SC1410A simplifies battery charger design by inte-
grating a high efficiency PWM with an internal 1.5A switch
and 0.1ohm current sense resistor, while the 500kHz
switching frequency allows a very small inductor to be used.
Only one external resistor is required to program the full
1.5A charging current to within 5% accuracy.
Charging circuits for batteries ranging from 2V to 18V are
easily implemented using the SC1410A. No ground sens-
ing of current is required, allowing the battery’s negative
terminal to be connected directly to ground. No blocking
diode is required between the IC and the battery since the
SC1410A enters sleep mode and consumes only 3µA when
the AC adapter is unplugged. Other features include soft
start, overvoltage protection, and a shutdown pin. The
SC1410A is available in a 16 pin QSOP package.
POWER MANAGEMENT
Revision: September 13, 2006
Description
Typical Application Circuits
1N4148
0.22uF
10uH
Figure 1: 500kHz Li-lon cell phone charger
1N5819
SC1410A
SW
BOOST
GND
OVP
SENSE
PROG
VCC
BAT
VC
1410 SCH41
0.1uF
1uF
1k
6.19k
300
Cout
22uF
Cin
10uF
4.2V
1N5819
+
NDS355N
70.6k
0.25%
100k
0.25%
8.2 to 18V
Constant Voltage/Constant Current
1
*NiCd and NiMh batteries require external charge termi-
nation circuitry not contained in the SC1410A
Features
Applications
1N4148
Charges NiCd, NiMH and Lithium-lon batteries
High efficiency current mode with 1.5A internal
switch and sense resistor
3% Typical charging current accuracy
Precision 0.5% voltage reference for voltage mode
charging or over voltage protection
Current sensing can be either terminal of battery
Low reverse battery drain current: 3µA
Charging current soft start
Shutdown control
500kHz switching uses small inductor
Chargers for NiCd*, NiMH* and Lithium batteries
Step down switching regulator with precision
adjustable current limit
0.22uF
33uH
Figure 2: Charging Lithium batteries
1N5819
SC1410A
SW
BOOST
GND
OVP
SENSE
PROG
VCC
BAT
VC
1410 SCH42
0.1uF
1uF
1k
Battery Charger
6.19k
300
Cout
22uF
Cin
10uF
SC1410A
1N5819
www.semtech.com
+
+
4.2V
4.2V
NDS355N
240k
0.25%
100k
0.25%
11 to 18V

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SC1410ACQSTRT Summary of contents

Page 1

... SC1410A Battery Charger Figure 2: Charging Lithium batteries 1N5819 SW VCC Cin 1N5819 10uF PROG 0.1uF BOOST GND VC 6.19k OVP 1uF SENSE BAT Cout + SC1410A 1k 300 22uF 4.2V + 4.2V 1410 SCH42 www.semtech.com 11 to 18V NDS355N 240k 0.25% 100k 0.25% ...

Page 2

... Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied Electrical Characteristics Unless specified 16V 8V VCC BAT BAT 2006 Semtech Corp < V < < ° ° < SC1410A ° ° www.semtech.com ° C ° C ° ...

Page 3

... POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified 16V 8V VCC BAT BAT 2006 Semtech Corp < > ° ° ± 1 µ SC1410A ° ° µ µ www.semtech.com µ µ µ ...

Page 4

... Pin Configuration TOP VIEW GND BOOST 3 14 GND 4 13 OVP SENSE 7 10 GND 8 9 (16 Pin QSOP) Pin Descriptions 2006 Semtech Corp. Ordering Information Note: GND (1) Only available in tape and reel packaging. A reel VCC2 contains 2500 devices. VCC1 PROG VC NC BAT GND ...

Page 5

... A/A. The programmed output current is therefore given 465 I 2000 I BAT PROG R PROG PROG I BAT where Amps BAT PROG 2006 Semtech Corp. + SHUTDOWN 500kHz OSCILLATOR - - SLOPE - COMP 60k - CA2 + PROG C R PROG PROG As the voltage at the OVP pin rises, reaching V voltage amplifier VA sources current into R I ...

Page 6

... BAT PROG 2006 Semtech Corp. Soft Start - A capacitor on the VC Pin implements the soft start function for the SC1410A. Soft start controls the rate at which output voltage rises so that high cur- rent surges can be avoided or minimized. In order for soft start to be effective, the soft start time must be much longer than the ramp up time of the input supply ...

Page 7

... Io (A) Efficiency at 8.4V output 100% Vout=8.4V Input diode losses included 90% 12V Vin=15V 80% 70% 60% 0.0 0.2 0.4 Io (A) VC Pin characteristics -200 -150 -100 -50 0 0.0 0.5 1.0 V (V) VC 2006 Semtech Corp. 0.6 0.8 1.0 0.6 0.8 1.0 1.5 2.0 7 SC1410A www.semtech.com ...

Page 8

... SEATING PLANE C SIDE VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. DATUMS -A- AND -B- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MO-137, VARIATION AB. 2006 Semtech Corp. A DIM D MIN e A .053 A1 .004 A2 .049 b .008 c .006 ...

Page 9

... POWER MANAGEMENT Land Pattern - QSOP-16 X (C) P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Contact Information Phone: (805)498-2111 FAX (805)498-3804 2006 Semtech Corp. DIM INCHES Semtech Corporation Power Management Products Division ...

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