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LM27952SDX 数据表(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM27952SDX
功能描述  White LED Adaptive 1.5X/1X Switched Capacitor Current Driver
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM27952SDX 数据表(HTML) 2 Page - National Semiconductor (TI)

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Connection Diagram
LM27952
14-pin No-Pullback Leadless Leadframe Package (LLP-14)
4mm x 3mm x 0.8mm
NS Package Number SDA14A
20148002
Pin Description
Pin
Name
Description
1
C2+
Flying Capacitor C2 Connection
2V
OUT
Pre-Regulated Charge Pump Output
3
C1+
Flying Capacitor C1 Connection
4
D4
Regulated Current Sink Input.
5
D3
Regulated Current Sink Input.
6
D2
Regulated Current Sink Input.
7
D1
Regulated Current Sink Input.
8I
SET
Current Set Input. Placing a resistor (R
SET) between this pin and GND sets
the LED current for all the LEDs. LED Current = 200 x (1.25V ÷ R
SET).
9
EN
Enable Logic Input Pin. Logic Low = Shut Down, Logic High = Enabled. There
is a 150k
Ω (typ.) resistor connected internally between the EN pin and GND.
10
PWM
Current Sink Modulation Logic Input Pin. Logic Low = Off, Logic High = On.
Applying a Pulse Width Modulated (PWM) signal to this pin allows the
regulated current sinks to be modulated without shutting down the internal
Charge Pump and the V
OUT node.
11
V
IN
Input Supply Range: 3.0V to 5.5V.
12
C2-
Flying Capacitor C2 Connection.
13
GND
Power Supply Ground Connection.
14
C1-
Flying Capacitor C1 Connection.
Ordering Information
Order Number
Package Description
Package Marking
Supplied as Tape and Reel
(Units)
LM27952SD
No-Pullback
LLP-14
XXXXX
YYYYY = D005B
1000
LM27952SDX
4500
www.national.com
2


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