RT8452GS Richtek USA Inc, RT8452GS Datasheet - Page 3

• Manufacturer Part Number: RT8452GS
• Description: IC PWM CTRLR LED DVR 16SOP
• Manufacturer: Richtek USA Inc

Specifications of RT8452GS

• Internal Driver: No
• Type - Primary: Backlight, General Purpose
• Mounting Type: Surface Mount
• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Frequency: 280kHz ~ 420kHz
• Voltage - Supply: 4.5 V ~ 36 V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Operating Temperature: -

DS8452-01
September 2010
Dimming
4.5V to 36V
4.5V to 36V
Analog
10k
R
V
10k
Dimming
C
3.3nF
V
R
Analog
3.3nF
C
IN
VC
5V
VC
IN
VC
5V
VC
10k
R
3.3nF
C
V
VC
5V
VC
IN
C
0.1µF
C
0.1µF
SS
SS
C
0.1µF
10µF
C
SS
10µF
C
Figure 4. Analog Dimming in Buck-Boost Configuration
IN
Figure 3. True PWM Dimming in Boost Configuration
IN
C
1µF
C
1µF
B
Figure 5. Analog Dimming in Buck Configuration
10µF
B
C
15
13
10
11
15
13
10
11
9
8
1
IN
C
1µF
9
1
8
ACTL
DCTL
GBIAS
B
VC
SS
VCC
EN
ACTL
DCTL
GBIAS
VC
SS
VCC
EN
15
13
10
11
9
8
1
ACTL
DCTL
GBIAS
VC
SS
VCC
EN
RT8452
RT8452
47µH
PWMOUT
PWMOUT
L1
PWMDIM
RT8452
GND
PWMDIM
GND
GATE
16, 17 (Exposed Pad)
GATE
16, 17 (Exposed Pad)
PWMOUT
OVP
PWMDIM
GND
ISW
OVP
ISN
ISP
ISW
ISN
ISP
GATE
16, 17 (Exposed Pad)
OVP
ISW
ISN
ISP
2
4
7
6
3
5
14
14
2
4
6
7
3
5
6
7
2
4
3
5
14
M1
47µH
L1
R
M1
D1
R
0.05
SENSE
SW
R
0.05
C
1µF
SW
R2
R2
D1
OUT
R1
R1
8 LEDs
D1
R
C
1µF
SENSE
OUT
0.1
R
C
1µF
SENSE
OUT
V
0.1
V
OUT
OUT
M1
47µH
L1
R
0.05
14 LEDs
M2
10 LEDs
SW
48V (Max.)
48V (Max.)
V
V
OUT
OUT
RT8452
www.richtek.com
3