RT9516 RICHTEK [Richtek Technology Corporation], RT9516 Datasheet - Page 3

• Manufacturer Part Number: RT9516
• Description: Linear Single Cell Li-lon Battery Charger with Single Input Supply for Portable Applications
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Flow Chart
Functional Pin Description
DS9516-01 April 2011
9 (Exposed Pad)
Pin No.
2,
1
3
4
5
6
7
8
NO
P-MOSFET = OFF
P-MOSFET = OFF
Power Off State
Standby State
V
V
Any State or
IN
IN
EN = H
EN = H
VIN
GND
ISET
ABI
ABO
EN
PGOOD
BATT
< OVP &
> OVP or
Pin Name
YES
Input Power Source. The VIN can withstand up to 28V input.
Power Ground. The exposed pad must be soldered to a large PCB and connected
to GND for maximum power dissipation.
Charge Current Set Point.
Auto-Booting External Input. ABI is pulled to GND through an internal 200kΩ
resistor.
Auto-Booting Logic Output.
Charge Enable (Active Low). With internal 200kΩ pull low resistor.
Battery Charge Current Output.
PGOOD pin connect to VIN with 10Ω N-MOSFET as power good condition.
P-MOSFET = OFF
V
IN
Sleep State
- V
BATT
NO
> V
OS
YES
I
CHG_pre
V
BATT > 2.5V
Pre_Charge
BATT
I
CV State
CHG
I
CHG_F
Pin Function
= (1/10) x
= 4.2V
NO
= 0A
YES
YES
I
CHG_F
Fast-Charge
R
V
Soft-Start
BATT
SET
= 570mA
= 2.8k
≥
4.2V
RT9516
www.richtek.com
NO
3