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Switching Charger. SY6912A Datasheet

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Switching Charger. SY6912A Datasheet






SY6912A Charger. Datasheet pdf. Equivalent




SY6912A Charger. Datasheet pdf. Equivalent





Part

SY6912A

Description

2A Multi-Cell High Efficiency Switching Charger



Feature


SY6912A 2A Multi-Cell High Efficiency Sw itching Charger Preliminary Specificati on General Description SY6912A is a 4. 0-23V input, 2A multi-cell synchronous Buck Li-Ion battery charger, suitable f or portable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buck regulator integra tes of 23V rating FETs with ultra low o n- resistance to a.
Manufacture

Silergy

Datasheet
Download SY6912A Datasheet


Silergy SY6912A

SY6912A; chieve high efficiency and simple circui t design. Features • Wide Input Volt age Range: 4.0V to 23V • High Efficie ncy Int. Synchronous Buck Regulator wit h Fixed 800kHz Switching Frequency • Selectable for Multi-cell Charging • Trickle Current / Constant Current / Co nstant Voltage Charge Mode • Programm able (2A Max) Constant Charge Current Programmable Charging Timer.


Silergy SY6912A

• Input Voltage UVLO and Battery OVP • Over Temperature Protection • Out put Short Circuit Protection • Automa tic Shutdown Prevents Reverse Energy Fl ow • Charge Status Indication • Nor mal Synchronous Buck Operation when Bat tery Removed • Compact package SO8E Ordering Information SY6912 □(□□) □ Temperature Code Package Code Optio nal Spec Code Temperature Range: -40°C t.


Silergy SY6912A

o 85°C Ordering Number SY6912AFCC Pac kage type SO8E Note Applications • • • • • • Cellular Telephones , PDA, MP3 Players, MP4 Players Digital Cameras Bluetooth Applications PSP Gam e Players, NDS Game Players Notebook e n tia l-P re pa re d fo rI nt er n Typical Applications al Battery Ch arge Control & Protection Logic Si le rg y Co rp .C on fid Fi.

Part

SY6912A

Description

2A Multi-Cell High Efficiency Switching Charger



Feature


SY6912A 2A Multi-Cell High Efficiency Sw itching Charger Preliminary Specificati on General Description SY6912A is a 4. 0-23V input, 2A multi-cell synchronous Buck Li-Ion battery charger, suitable f or portable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buck regulator integra tes of 23V rating FETs with ultra low o n- resistance to a.
Manufacture

Silergy

Datasheet
Download SY6912A Datasheet




 SY6912A
SY6912A
2A Multi-Cell High Efficiency Switching Charger
Preliminary Specification
General Description
SY6912A is a 4.0-23V input, 2A multi-cell synchronous
Buck Li-Ion battery charger, suitable for portable
application. Select pin is convenient for multi-cell
charging. 800 kHz synchronous buck regulator integrates
of 23V rating FETs with ultra low on- resistance to
achieve high efficiency and simple circuit design.
Ordering Information
SY6912 (□□)
Temperature Code
Package Code
Optional Spec Code
Temperature Range: -40°C to 85°C
Ordering Number
SY6912AFCC
Package type
SO8E
Note
Features
Wide Input Voltage Range: 4.0V to 23V
High Efficiency Int. Synchronous Buck Regulator
with Fixed 800kHz Switching Frequency
Selectable for Multi-cell Charging
Trickle Current / Constant Current / Constant Voltage
Charge Mode
Programmable (2A Max) Constant Charge Current
Programmable Charging Timer
Input Voltage UVLO and Battery OVP
Over Temperature Protection
Output Short Circuit Protection
Automatic Shutdown Prevents Reverse Energy Flow
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
Battery
Charge
Control &
Protection
Logic
Figure 1. SY6912A Schematic Diagram
SY6912A Rev.0.1 Silergy Corp. Confidential- Prepared for Internal Use Only 1




 SY6912A
Pinout (top view)
SY6912A
(SO8E)
Top Mark: AIQxyz (device code: AIQ, x=year code, y=week code, z= lot number code)
Name
RS
BAT
NTC
CEL
STAT
LX
IN
TIM
GND
Number
1
2
3
4
5
6
7
8
Exposed pad
Description
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 shutdown the IC.
Pull down for single-cell, pull high for 2 cells, open for 3 cells.
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.
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.
Ground pin.
Absolute Maximum Ratings (Note 1)
CEL, NTC, STAT, ---------------------------------------------------------------------------------------------------- -0.5-32V
IN, BAT, LX, --------------------------------------------------------------------------------------------------- -0.5- 23V
TIM, ------------------------------------------------------------------------------------------------------------------ -0.5- 3.6V
RS, ------------------------------------------------------------------------------------------------------------- BAT-0.3~BAT+0.3
LX Pin current continuous -------------------------------------------------------------------------------------------------- 2A
Power Dissipation, PD @ TA = 25°C, SO8E----------------------------------------------------------------------------- 3.3W
Package Thermal Resistance (Note 2)
θ JA -------------------------------------------------------------------------------------------------------------- 30°C/W
θ JC ------------------------------------------------------------------------------------------------------------- 20°C/W
Junction Temperature Range ---------------------------------------------------------------------------------- -40°C to 125°C
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C
Storage Temperature Range ---------------------------------------------------------------------------------- -65°C to 125°C
Recommended Operating Conditions(Note 3)
CEL, NTC, STAT, ---------------------------------------------------------------------------------------------------less than 32V
IN, BAT, LX, ---------------------------------------------------------------------------------------------------less than 23V
TIM, ------------------------------------------------------------------------------------------------------------------less than 3.6V
RS, ------------------------------------------------------------------------------------------ in the range of BAT-
0.3~BAT+0.3LX Pin current continuous ----------------------------------------------------------------------------------------
less than 2A
Junction Temperature Range ---------- --------------------------------------------------------------------- -20°C to 100°C
Ambient Temperature Range --------------------------------------------------------------------------------- -40°C to 85°C
SY6912A Rev.0.1 Silergy Corp. Confidential- Prepared for Internal Use Only 2




 SY6912A
SY6912A
Electrical Characteristics
TA=25°C, VIN=15V, GND=0V, CIN=1uF, LB=2.2uH, RS=25m, CTIM=470nF, 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 quiescent current
Oscillator and PWM
fOSC Oscillator frequency
D PFET duty cycle
Power MOSFET
RNFET
RPFET
RDS(ON) of N-FET
RDS(ON) of P-FET
Voltage Regulation
Single-cell CV charge mode
VCV 2-cell CV charge mode
3-cell CV charge mode
Single-cell Voltage threshold for Recharge
ΔVRCH
2-cell Voltage threshold for Recharge
3-cell Voltage threshold for Recharge
Single-cell TC charge mode voltage threshold
VTRK
2-cell TC charge mode voltage threshold
3-cell TC charge mode voltage threshold
Battery Connect Detection
VDET
tDET
Detect voltage threshold
Detect delay time
Charge Current
Internal charge current accuracy for Constant
Current Mode
Internal charge current accuracy for Trickle
Current Mode
Output Voltage OVP
VOVP
Output voltage OVP threshold
Output Short Protection
VSHOT
fFBK
ILM
Output short protection threshold
Frequency fold back
Power FET current limit
Timer
TTC
TCC
TMC
TTERM
TRCHG
Trickle current charge timeout
Constant current charge timeout
Charge mode change delay time
Termination delay time
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
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
NTC pull down to GND
Disable Charge
Min
4.0
640
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
CTIM=330nF
4.16
8.32
12.48
50
100
150
2.2
4.4
6.6
80%
-10%
-50%
108%
1.70
0.23
3.0
Falling edge
Rising edge
Measured from VIN to VBAT
70%
28%
140
Typ
190
750
800
150
160
4.20
8.40
12.60
100
200
300
2.5
5.0
7.5
30
113%
2.00
12.5%
4.0
0.5
4.5
30
30
30
75%
5%
30%
2%
280
Max Unit
23 V
3.9 V
mV
24 V
mV
25 uA
2.0 mA
960 kHz
100 %
m
m
4.24
8.48
12.72
150
300
450
2.8
5.6
8.4
V
mV
V
90%
VIN
ms
10%
50%
118% VCV
2.30
V
fOSC
A
0.67 hour
6.0 hour
ms
ms
ms
80%
32%
VIN
420 mV
SY6912A Rev.0.1 Silergy Corp. Confidential- Prepared for Internal Use Only 3



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