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LM3409-Q1 データシート(PDF) 3 Page - Texas Instruments

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部品番号 LM3409-Q1
部品情報  P-FET Buck Controller for High-Power LED Drivers
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM3409-Q1 データシート(HTML) 3 Page - Texas Instruments

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UVLO
1
VCC
2
VIN
3
4
12
EN
11
IADJ
10
CSP
5
13
14
COFF
CSN
NC
NC
6
GND
9
8
PGATE
7
NC
NC
UVLO
1
CSP
2
VIN
3
4
8
COFF
7
EN
6
CSN
5
9
10
GND
PGATE
DAP
VCC
IADJ
3
LM3409, LM3409-Q1, LM3409HV, LM3409HV-Q1
www.ti.com
SNVS602L – MARCH 2009 – REVISED JUNE 2016
Product Folder Links: LM3409 LM3409-Q1 LM3409HV LM3409HV-Q1
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
5 Device Comparison Table
ORDERABLE
NUMBER
MAXIMUM INPUT
VOLTAGE (V)
AEC-Q100 GRADE 1
QUALIFIED
LM3409
42
N
LM3409-Q1
Y
LM3409HV
75
N
LM3409HV-Q1
Y
6 Pin Configuration and Functions
DGQ Package
10-Pin HVSSOP
Top View
NFF Package
14-Pin PDIP
Top View
Pin Functions
PIN
DESCRIPTION
NAME
PDIP
HVSSOP
UVLO
1
1
Input undervoltage lockout. Connect to a resistor divider from VIN and GND. Turn-on threshold is
1.24 V and hysteresis for turnoff is provided by a 22 µA current source.
IADJ
3
2
Analog LED current adjust. Apply a voltage from 0 to 1.24 V, connect a resistor to GND, or leave
open to set the current sense threshold voltage.
EN
4
3
Logic level enable and PWM dimming. Apply a voltage >1.74 V to enable device, a PWM signal to
dim, or a voltage < 0.5 V for low-power shutdown.
COFF
5
4
Off-time programming. Connect resistor from VO, capacitor to GND to set off-time.
GND
6
5
Connect to system ground.
PGATE
9
6
Gate drive. Connect to gate of external P-channel MOSFET.
CSN
10
7
Negative current sense. Connect to negative side of sense resistor.
CSP
11
8
Positive current sense. Connect to positive side of sense resistor (also to VIN).
VCC
12
9
VIN– referenced linear regulator output. Connect at least a 1-µF ceramic capacitor to VIN. The
regulator provides power for the P-channel MOSFET drive.
VIN
14
10
Input voltage. Connect to the input voltage.
Thermal pad
Connect to GND pin. Place 4 to 6 vias from thermal pad to GND plane.


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