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LM3503ITL-25NOPB Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce LM3503ITL-25NOPB
Description  Dual-Display Constant Current LED Driver with Analog Brightness Control
Download  28 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

LM3503ITL-25NOPB Fiches technique(HTML) 3 Page - Texas Instruments

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LM3503
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SNVS329D – JULY 2005 – REVISED AUGUST 2006
VIN (Bump B3): Input voltage connection pin. The CIN capacitor should be as close to the device as possible,
between the VIN pin and ground plane.
En2 (Bump A3): Enable pin for the internal NMOS FET switch (Figure 3: N2) during device operation. When
VEn2 is ≥ 1.4V, the internal NMOS FET switch turns off and the SUB display is turned on. The En2 pin has an
internal pull down circuit, thus the internal NMOS FET switch is normally in the on state of operation with the
SUB display turned off. When VEn2 is ≤ 0.3V, the internal NMOS FET switch turns on and the SUB display is
turned off. If both VEn1 and VEn2 are ≤ 0.3V the LM3503 will shutdown. If VOUT2 is not used, En2 must be floating
or grounded and En1 used to enable the device.
En1 (Bump A2): Enable pin for the internal PMOS FET switch (Figure 3: P1) during device operation. When
VEn1 is ≤ 0.3V, the internal PMOS FET switch turns on and the MAIN display is turned off. When VEn1 is ≥ 1.4V,
the internal PMOS FET switch turns off and the MAIN display is turned on. If both VEn1 and VEn2 are ≤ 0.3V the
LM3503 will shutdown. The En1 pin has an internal pull down circuit, thus the internal PMOS FET switch is
normally in the on state of operation with the MAIN display turned off. If VOUT2 is not used, En2 must be grounded
and En1 use to enable the device.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1) (2)
VIN Pin
−0.3V to +5.5V
Sw Pin
−0.3V to +48V
Fb Pin
−0.3V to +5.5V
Cntrl Pin
−0.3V to +5.5V
VOUT1Pin
−0.3V to +48V
VOUT2 Pin
−0.3V to VOUT1
En1
−0.3V to +5.5V
En2
−0.3V to +5.5V
Continuous Power Dissipation
Internally Limited
Maximum Junction Temperature (TJ-MAX)
+150°C
Storage Temperature Range
−65°C to +150°C
ESD Rating(3)
Human Body Model
2 kV
Machine Model
200V
(1)
Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical characteristic specifications do not
apply when operating the device outside of its rated operating conditions.
(2)
If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
(3)
The human body model is a 100 pF capacitor discharged through a 1.5 k
Ω resistor into each pin. The machine model is a 200 pF
capacitor discharged directly into each pin.
Operating Conditions
(1) (2)
Junction Temperature (TJ) Range
−40°C to +125°C
Ambient Temperature (TA) Range
−40°C to +85°C
Supply Voltage, VIN Pin
2.5V to 5.5V
En1 and En2 Pins
0V to 5.5V
Cntrl Pin
0V to 3.5V
(1)
Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical characteristic specifications do not
apply when operating the device outside of its rated operating conditions.
(2)
All voltages are with respect to the potential at the GND pin.
Copyright © 2005–2006, Texas Instruments Incorporated
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