OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

RT8482GQW

P1-P3P4-P6P7-P9P10-P12P13-P15
RT8482
4
DS8482-02 May 2012www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Pin No.
SOP-16 WQFN-16L 3x3
Pin Name Pin Function
1 1 GBIAS Internal Gate Driver Bias. A good bypass capacitor is required.
2 2 GATE External MOSFET Switch Gate Driver Output.
3, 5, 12 3, 5, 12 NC No Internal Connection.
4 4 ISW
External MOSFET Switch Current Sense. Connect the current sense
resistor between external N-MOSFET switch and the ground.
6 6 ISP LED Current Sense Amplifier Positive Input.
7 7 ISN
LED Current Sense Amplifier Negative Input. Voltage threshold
between ISP and ISN is 190mV.
8 8 VC PWM Control Loop Compensation.
9 9 ACTL
Analog Dimming Control. The effective programming voltage range
of the pin is between 0.2V and 1.2V.
10 10 DCTL
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
11 11 SS Soft-Start. A capacitor of at least 10nF is required for proper soft start.
13 13 EN
Chip Enable (Active High). When this pin voltage is low, the chip is in
shutdown mode.
14 14 OVP
Over Voltage Protection. The PWM converter turns off when the
voltage of the pin goes to higher than 1.2V.
15 15 VCC
Power Supply Pin of the Chip. For good bypass, a low ESR capacitor
is required.
16
16,
17 (Exposed Pad)
GND
Ground. The exposed pad must be soldered to a large PCB and
connected to GND for maximum power dissipation.
RT8482
5
DS8482-02 May 2012 www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Function Block Diagram
Figure 4
V
ACTL
(V)
V
ISP
– V
ISN
(mV)
0.2 1.2
190
0
R
R
S
OSC
+
-
+
-
4.5V
1.18V
+
-
+
-
1.2V
+
-
+
-
2V
Shutdown
+
-
GM
6µA
ISP
ISN
DCTL
ACTL
VCC
SS
GND
VC
EN
OVP
1.2V
R
+
-
R
110mV
+
-
8.5V
VOC
5V
100k
ISW
GATE
GBIAS
RT8482
6
DS8482-02 May 2012www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
Electrical Characteristics
Parameter Symbol Test Conditions Min Typ Max Unit
Overall
Supply Current I
VCC
VC ≤ 0.4V (Switching off) -- 6 7.2 mA
Shutdown Current I
SHDN
V
EN
≤ 0.7V -- 12 -- μA
Logic-High V
IH
2 -- --
EN Threshold
Voltage
Logic-Low V
IL
-- -- 0.5
V
EN Input Current V
EN
≤ 3V -- -- 1.2 μA
Current Sense Amplifier
Input Threshold (V
ISP
− V
ISN
) 12V ≤ common mode ≤ 36V 180 190 200 mV
ISP / ISN Input Current I
ISP
/ I
ISN
4.5V ≤ V
ISP
= V
ISN
≤ 48V -- 140 -- μA
VC Output Current I
VC
V
ISP
− V
ISN
= 190mV,
0.5V ≤ V
C
≤ 2.4V
-- ±20 -- μA
VC Threshold for PWM Switch
Off
-- 0.7 -- V
LED Dimming
V
ACTL
= 1.2V -- 1 --
Analog Dimming ACTL Pin
Input Current
I
ACTL
V
ACTL
= 0.2V -- 10 --
μA
Recommended Operating Conditions (Note 5)
z Supply Input Voltage Range, VCC------------------------------------------------------------------------------------- 4.5V to 36V
z Junction Temperature Range-------------------------------------------------------------------------------------------- −40°C to 125°C
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VCC---------------------------------------------------------------------------------------------- 38V
z GBIAS, GATE -------------------------------------------------------------------------------------------------------------- 10V
z ISW --------------------------------------------------------------------------------------------------------------------------- 1V
z ISP, ISN ---------------------------------------------------------------------------------------------------------------------- 54V
z DCTL, ACTL, OVP Pin Voltage ---------------------------------------------------------------------------------------- 8V (Note 2)
z EN Pin Voltage ------------------------------------------------------------------------------------------------------------- 20V
z Power Dissipation, P
D
@ T
A
= 25°C
SOP-16 ---------------------------------------------------------------------------------------------------------------------- 1.176W
WQFN-16L 3x3 ------------------------------------------------------------------------------------------------------------- 1.471W
z Package Thermal Resistance (Note 3)
SOP-16, θ
JA
----------------------------------------------------------------------------------------------------------------- 85°C/W
WQFN-16L 3x3, θ
JA
------------------------------------------------------------------------------------------------------- 68°C/W
WQFN-16L 3x3, θ
JC
------------------------------------------------------------------------------------------------------ 7.5°C/W
z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.)------------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
z ESD Susceptibility (Note 4)
HBM (Human Body Model)---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
(V
CC
= 24V, No Load on any Output, T
A
= 25°C, unless otherwise specified)
P1-P3P4-P6P7-P9P10-P12P13-P15

RT8482GQW

Mfr. #:
Buy RT8482GQW
Manufacturer:
Description:
IC LED DRIVER CTRLR DIM 16WQFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet