LM3552SD/NOPB National Semiconductor, LM3552SD/NOPB Datasheet - Page 2
![IC LED DRIVER PHOTO FLASH 14-LLP](/photos/7/34/73425/pkg_sda14b_sml.jpg)
LM3552SD/NOPB
Manufacturer Part Number
LM3552SD/NOPB
Description
IC LED DRIVER PHOTO FLASH 14-LLP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Photo Flash LEDr
Datasheet
1.LM3552SDNOPB.pdf
(16 pages)
Specifications of LM3552SD/NOPB
Topology
PWM, Step-Up (Boost)
Number Of Outputs
1
Internal Driver
Yes
Type - Primary
Flash/Torch
Type - Secondary
White LED
Frequency
900kHz ~ 1.6MHz
Voltage - Supply
2.7 V ~ 5.5 V
Voltage - Output
10.6 V ~ 12.4 V
Mounting Type
Surface Mount
Package / Case
14-LLP
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
1A
Internal Switch(s)
Yes
Efficiency
93%
For Use With
LM3552SDEV - BOARD EVALUATION LM3552SD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM3552SD
LM3552SDNOPB
LM3552SDNOPBTR
LM3552SDNOPBTR
LM3552SDTR
LM3552SDNOPB
LM3552SDNOPBTR
LM3552SDNOPBTR
LM3552SDTR
www.national.com
Connection Diagram
Pin Descriptions
Ordering Information
1,7,DAP
Order Number
Pin
LM3551SDX
LM3552SDX
13
10
12
11
14
9
8
3
5
4
2
6
LM3551SD
LM3552SD
SD(LM3551)
EN(LM3552)
FET-T
FET-F
AGND
Name
OVP
GND
FTO
SW
T/F
V
SS
FB
V
IN
C
Input Voltage. Input range: 2.7V to 5.5V.
TORCH/FLASH Pin. Low = Torch Mode, High = Flash Mode
Switch Pin
Over Voltage Protection Pin
Compensation network connection. Connected to the output of the voltage error amplifier.
Shutdown pin logic input. High = Shutdown, Low = Enabled
Enable pin logic input. High = Enabled, Low = Shutdown
Flash Timeout. External capacitor determines max. duration allowed flash pulse
Soft Start Pin
Feedback Pin
Torch FET Drain
Flash FET Drain
Ground
Analog Ground. Connect the ground of the compensation components, C
AGND. AGND must be connected to the GND pin through a low impedance connection.
SD / EN
SD
SD
EN
EN
NS Package Number SDA14B
14 Pin Dual LLP Package
Package Marking
2
L3551SD
L3551SD
L3552SD
L3552SD
Function
1000 units, Tape-and-Reel
4500 units, Tape-and-Reel
1000 units, Tape-and-Reel
4500 units, Tape-and-Reel
Supplied As
FTO
and soft start cap to
20151202