Switching Charger. SY6952B Datasheet

SY6952B Charger. Datasheet pdf. Equivalent

SY6952B Datasheet
Recommendation SY6952B Datasheet
Part SY6952B
Description 2A Single-Cell High Efficiency Switching Charger
Feature SY6952B; Application Note: AN_SY6952B 2A Single-Cell High Efficiency Switching Charger with Adaptive Input Cu.
Manufacture Silergy
Datasheet
Download SY6952B Datasheet




Silergy SY6952B
Application Note: AN_SY6952B
2A Single-Cell High Efficiency Switching Charger
with Adaptive Input Current Limit
General Description
SY6952B is a 4.0-23V input, 2A single-cell
synchronous buck Li-Ion battery charger, suitable for
portable application. Select pin is convenient for
different cell voltage. Integrated 800 kHz synchronous
buck regulator consists of 23V rating FETs with
extremely low ON resistance to achieve high charge
efficiency and simple peripheral circuit design.
Ordering Information
SY6952(□□)
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number
SY6952BFCC
Package type
SO8E
Note
Features
Wide Input Voltage Range: 4.0V to 23V
High Efficiency Int. Synchronous Buck Regulator
with Fixed 800kHz Switching Frequency
Trickle Current / Constant Current / Constant
Voltage Charge Mode
Adaptive input current limit
Programmable Charging Timeout
4.35 and 4.2V selectable cell voltage
Programmable (2A MAX) Constant Charge Current
Input Voltage UVLO and Battery OVP
Over Temperature Protection
Output Short Circuit Protection
Charge Status Indication
Normal Synchronous Buck Operation when Battery
Removed
Compact package SO8E
Applications
Cellular Telephones,
PDA, MP3 Players, MP4 Players
Digital Cameras
Bluetooth Applications
PSP Game Players, NDS Game Players
Notebook
Typical Applications
Figure1. Schematic Diagram
AN_SY6952B Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
1



Silergy SY6952B
Pinout (top view)
AN_SY6952B
Name
TIM
RS
BAT
NTC
VSET
STAT
LX
IN
GND
(SO8E)
Top Mark: ALBxyz (device code: ALB, x=year code, y=week code, z= lot number code)
Number
Description
1
2
3
4
5
6
7
8
Exposed pad
Charge time limit pin. Connect this pin with a capacitor to ground. Internal current
source charge the capacitor for TC mode and CC mode’s charge time limit. TC
charge time limit is about 1/9 of CC charge time.
Charge current program pin. Connect a current sense resistor from RS pin to BAT
pin. Average charge current is detected for both TC mode and CC mode.
Battery positive pin.
Thermal protection pin. UTP threshold is about 75%VIN and OTP threshold is
about 30%VIN. Pull up to VIN can disable charge logic and make the IC operate as
normal buck regulator. Pull down to ground can shut down the IC.
VSET is pull down internally. Open or pull down for 4.2V cell voltage, pull up for
4.35V cell voltage.
Charge status indication pin. It is open drain output pin and can be used to turn on a
LED to indicate the charge in process. When the charge is done, LED is off.
Switch node pin. This pin connects the drains of the integrated main and
synchronous power MOSFET switches. Connect to external inductor.
Positive power supply input pin. VIN ranges from 4V to 23V for normal operation.
It has UVLO function and must be 300mV greater than the battery voltage to
enable normal operation.
Ground pin.
Absolute Maximum Ratings (Note 1)
IN, BAT, RS, LX, ---------------------------------------------------------------------------------------------------- -0.5- 25V
VSET, TIM, NTC, STAT ------------------------------------------------------------------------------------------- -0.5- 25V
LX Pin current continuous ------------------------------------------------------------------------------------------------- 2A
Power Dissipation, PD @ TA = 25°C, SO8E-------------------------------------------------------------------------- 3.3W
Package Thermal Resistance
θ JA -------------------------------------------------------------------------------------------------------------- 30°C/W
θ JC ------------------------------------------------------------------------------------------------------------- 20°C/W
Junction Temperature Range ---------------------------------------------------------------------------------- -40°C to 150°C
Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------------- 260°C
Storage Temperature Range ----------------------------------------------------------------------------------- -65°C to 125°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions
IN, BAT, RS, LX, --------------------------------------------------------------------------------------------------less than 23V
VSET, TIM, NTC, STAT -----------------------------------------------------------------------------------------less than 23V
LX Pin current continuous -------------------------------------------------------------------------------------- less than 1.5A
Junction Temperature Range ---------- ---------------------------------------------------------------------- -20°C to 100°C
Ambient Temperature Range ---------------------------------------------------------------------------------- -40°C to 85°C
AN_SY6952B Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
2



Silergy SY6952B
AN_SY6952B
Electrical Characteristics
TA=25°C, VIN=15V, GND=0V, CIN=10uF, LB=6.8uH, RS=25m, CTIM=330nF, unless otherwise specified.
Symbol
Parameter
Bias Supply (VIN)
VIN Supply voltage
VUVLO
VIN under voltage lockout threshold
VUVLO
VIN under voltage lockout hysteresis
VOVP
Input overvoltage protection
VOVP
Input overvoltage protection hysteresis
Quiescent Current
IBAT Battery discharge current
IIN Input leakage current
Oscillator and PWM
fOSC Oscillator frequency
D PFET duty cycle
Power MOSFET
RNFET
RDS(ON) of N-FET
RPFET
RDS(ON) of P-FET
Voltage Regulation
VCV
Low VSET for 4.2V cell voltage
High VSET for 4.35V cell voltage
VRCH
4.2V CV threshold for Recharge
4.35V CV threshold for Recharge
VTRK
TC charge mode voltage threshold
Battery Connect Detection
VDET
Detect voltage threshold
tDET Detect delay time
Charge Current
Internal charge current accuracy for Constant
Current Mode
Internal charge current accuracy for Trickle
Current Mode
Input current limit slow response
VINSL
IN voltage falling threshold at high current
VINSL
IN voltage hysteresis at high current
Input current limit quick response
V IN voltage falling threshold at high current
VINQK
IN voltage hysteresis at high current
Output Voltage OVP
VOVP
Output voltage OVP threshold
Output Short Protection
VSHOT
fFBK
ILM
Timer
Output short protection threshold
Frequency fold back
Power FET current limit
TTC Trickle current charge timeout
TCC Constant current charge timeout
TMC Charge mode change delay time
TTERM
Termination delay time
TRCHG
Recharge time delay
Battery Thermal Protection NTC
UTP
Under temperature protection
Under temperature protection hysteresis
OTP
Over temperature protection
Over temperature protection hysteresis
Automatic Shutdown
VASD
ASD voltage threshold hysteresis
Thermal Shutdown
TSD Thermal shutdown temperature
TSDHYS
Thermal shutdown temperature hysteresis
Conditions
VIN rising and measured from
VIN to GND
Measured from VIN to GND
VIN rising and measured from
VIN to GND
Measured from VIN to GND
Enable off
Disable Charge
Include bond-wire
0°C <=TA<=70°C
0°C <=TA<=70°C
0°C <=TA<=70°C
VSHOT< VBAT< VRCH
ICC=25mV/RS
ITC=2.5mV/RS
VBAT falling edge
VBAT<2V/CELL
CTIM=330nF
Falling edge
Rising edge
Measured from VIN to VBAT
Rising Threshold
Min
4.0
23
640
4.16
4.30
50
100
2.2
80%
30
-10%
-50%
105%
1.70
0.23
3.0
70%
28%
Typ
190
750
800
150
160
4.20
4.35
100
150
2.5
35
4.6
50
4.4
100
110%
2.00
12.5%
3.0
0.5
4.5
30
30
30
75%
5%
30%
2%
80
160
20
Max
23
3.9
25
1.5
960
100
4.24
4.40
150
200
2.8
90%
40
10%
50%
115%
2.30
0.67
6.0
80%
32%
Unit
V
V
mV
V
mV
uA
mA
kHz
%
m
m
V
mV
V
VIN
ms
V
mV
V
mV
VCV
V
fOSC
A
hour
hour
ms
ms
ms
VIN
mV
ºC
ºC
AN_SY6952B Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
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