RT8482GS Richtek USA Inc, RT8482GS Datasheet - Page 4

• Manufacturer Part Number: RT8482GS
• Description: IC LED DVR BUCK/BOOST 2A 8SOP
• Manufacturer: Richtek USA Inc

Specifications of RT8482GS

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 1028-1005-2

RT8482
Functional Pin Description
www.richtek.com
4
SOP-16
3, 5, 12
10
13
14
15
16
11
1
2
4
6
7
8
9
Pin No.
17 (Exposed Pad)
WQFN-16L 3x3
3, 5, 12
16,
10
13
14
15
11
1
2
4
6
7
8
9
GBIAS
GATE
ISW
ISP
ISN
VC
ACTL
DCTL
SS
EN
OVP
VCC
GND
NC
Pin Name
Power Supply Pin of the Chip. For good bypass, a low ESR capacitor
is required.
Internal Gate Driver Bias Pin. A good bypass capacitor is required.
External MOSFET Switch Gate Driver Output Pin.
No Internal Connection.
External MOSFET Switch Current Sense Pin. Connect the current
sense resistor between external N-MOSFET switch and the ground.
LED Current Sense Amplifier Positive Input.
LED Current Sense Amplifier Negative Input. Voltage threshold
between ISP and ISN is 190mV.
PWM Control Loop Compensation Pin.
Analog Dimming Control Pin. The effective programming voltage
range of the pin is between 0.2V and 1.2V.
By adding signal on DCTL pin can be averaged and converted into
analog dimming signal on the ACTL pin following the formula below. a
0.47μF filtering capacitor on ACTL pin, the PWM dimming
Soft-Start Pin. A capacitor of at least 10nF is required for proper soft
start.
Chip Enable (Active High). When this pin voltage is low, the chip is in
shutdown mode.
Over Voltage Protection Pin. The PWM converter turns off when the
voltage of the pin goes to higher than 1.2V.
Ground Pin. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
Pin Function
DS8482-00 August 2010