RT9519A RICHTEK [Richtek Technology Corporation], RT9519A Datasheet - Page 3

• Manufacturer Part Number: RT9519A
• Description: Linear Single Cell Li-lon Battery Charger with Auto Power Path Management
• Manufacturer: RICHTEK [Richtek Technology Corporation]

DS9519A-02 April 2011
Functional Pin Description
21 (Exposed Pad)
17, 18, 19
Pin No.
8,9
10
11
12
13
14
15
16
20
4,
1
2
3
5
6
7
VIN
PGOOD
GND
ISETA
TS
TIMER
BAT
EN
ISET
VP
ISETU
ISETL
VSET
SYS
USUS
CHG
NC
Pin Name
Supply Voltage Input.
Power Good Status Output. Open-drain output.
Charger Status Output. Open-drain output.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Charge Current Set Input. Connect a resistor (R
Temperature Sense Input. The TS pin connects to a battery’s thermistor to
determine if the battery is too hot or too cold to charge. If the battery’s
temperature is out of range, charging is paused until it re-enters the valid range.
TS also detect battery (with NTC) is present or not.
Safe Charge Timer Setting.
Battery Charge Current Output.
Charge Enable. Active Low input. 200kΩ pull low.
Half Charge Current Set Input. Control by external GPIO, L = I
200kΩ pull low.
This pin must be provided a regulated voltage from 2.95V to 3.6V by external
power.
200kΩ pull low.
VIN Current Limit Control Input. H : see ISETU, L = 1.5A, 200kΩ pull low.
Battery Regulation Set Input. Control by external GPIO. L = 4.05V, H = 4.2V,
200kΩ pull low.
No Internal Connection.
System Connect Pin. Connect this pin to System with a minimum 10μF ceramic
capacitor to GND.
VIN Suspend Control Input. H = Suspend, L = No suspend. 200kΩ pull low.
VIN Current Limit Control Input. When ISETL = H, L = 100mA, H = 500mA,
Pin Function
ISETA
) between ISETA and GND.
CHG1
RT9519A
www.richtek.com
/ 2, H = I
CHG1
,
3