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PDF DLD101 Data sheet ( Hoja de datos )
| Número de pieza | DLD101 | |
| Descripción | LINEAR MODE CURRENT SINK LED DRIVER | |
| Fabricantes | Diodes Incorporated | |
| Logotipo |  |
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DLD101
LINEAR MODE CURRENT SINK LED DRIVER
Features
Mechanical Data
• Primarily Designed for Driving LED/s for Illumination, Signage
and Backlighting Applications
• Ideally Suited for Linear Mode Constant Current Applications
• VBE Referenced Current Sink Circuit
• Includes:
• N-Channel Enhancement Mode MOSFET (Q1)
• Base Accessible Pre-Biased Transistor (Q2)
• High Voltage Capable (50V)
• Small Form Factor Surface Mount Package
• High Dissipation Capability
• Low Thermal Resistance
• Lead Free By Design/RoHS Compliant (Note 1)
• "Green" Device (Note 2)
• Qualified to AEC-Q101 Standards for High Reliability
• Case: DFN3030D-8
• Case Material: Molded Plastic, "Green" Molding Compound.
UL Flammability Classification Rating 94V-0
• Moisture Sensitivity: Level 1 per J-STD-020
• Terminals: Finish — NiPdAu over Copper leadframe. Solderable
per MIL-STD-202, Method 208
• Marking Information: See Page 6
• Ordering Information: See Page 6
• Weight: 0.0172 grams (approximate)
VCC Supply
RC
LED String
S2 B1 B1’ E1
8 7 65
R1 R2
Q1
Q2
12 34
D2 G2 NC C1
Top View
Internal Schematic
S2 B1 B1’ E1
8 765
1 234
D2 G2 NC C1
Top View
Package Pin-Out Configuration
43
C
Q2 B
R2
E R1
56
21
GD
Q1
S
78
VDS
Option 3
Option 2
Option 1
RS
Option 3:
ILED
≈
VBE
RS
Options 1 & 2:
ILED ≈
1.1 VBE
RS
Option 2:
Capacitor is across R2 for
better noise performance.
Typical Application Circuit for Linear
Mode Current Sink LED Driver
Maximum Ratings: (Q1) @TA = 25°C unless otherwise specified
Drain Source Voltage
www.DaGtaaSteh-eSeotu4rUc.ecoVmoltage
Drain Current (Note 3)
Characteristic
Drain Current (Note 3)
Body-Diode Continuous Current (Note 3)
TA = 25°C
TA = 70°C
Pulsed
Symbol
VDSS
VGSS
ID
IDM
IS
Value
100
±20
1.0
0.8
3.0
1.0
Unit
V
V
A
A
A
Maximum Ratings: (Q2) @TA = 25°C unless otherwise specified
Supply Voltage
Input Voltage
Output Current (DC)
Characteristic
Symbol
VCC
VIN
IO
Value
50
-5 to +30
100
Unit
V
V
mA
Thermal Characteristics – Total Device
Characteristic
Power Dissipation (Note 3) @TA = 25°C
Thermal Resistance Junction to Ambient Air (Note 3) @TA = 25°C
Thermal Resistance Junction to Case Air (Note 3) @TA = 25°C
Operating and Storage Temperature Range
Symbol
PD
RθJA
RθJC
TJ, TSTG
Value
0.7
178
30
-55 to +150
Notes:
1. No purposefully added lead.
2. Diodes Inc.'s "Green" policy can be found on our website at http://www.diodes.com/products/lead_free/index.php.
3. Part mounted on FR-4 substrate PC board, with minimum recommended pad layout (see page 6).
DLD101
Document number: DS32007 Rev. 6 - 2
1 of 7
www.diodes.com
Unit
W
°C/W
°C/W
°C
February 2010
© Diodes Incorporated
1 page  
DLD101
0.7
0.6 IC/IB = 10
Q2 Typical Performance Curves - continued
0.5
0.4
0.3
0.2
TA = 125°C TA = 150°C
0.1
0
1
TA = 85°C
TA = -55°C TA = 25°C
10 100 200
IC, COLLECTOR CURRENT (mA)
Fig. 11 Typical Collector-Emitter Saturation Voltage
vs. Collector Current
Typical Application Circuit
VCC Supply
RC
LED String
The DLD101 has been designed primarily for solid state lighting
applications, to be used as a current sink circuit solution for LEDs. It
features a N-channel MOSFET capable of 1A drive current and a pre-
biased NPN transistor (which allows direct connection to the base, or
via a series base resistor).
www.DataSh4eet4U3.com 2
G
C
1
D
Q2 B
R2
E R1
56 7
Q1
S
8
VDS
Option 3
Option 2
Option 1
RS
Option 3:
ILED
≈
VBE
RS
Options 1 & 2:
ILED ≈
1.1 VBE
RS
Option 2:
Capacitor is across R2 for
better noise performance.
Fig. 12 Typical Application Circuit for
Linear Mode Current Sink LED Driver
Figure 12 shows a typical application circuit diagram for driving an
LED or string of LEDs. Note that the pre-biased transistor (Q2) has
the option of bypassing the series base resistor by connecting directly
to pin 7. The N-MOSFET (Q1) is configured as a VBE referenced
current sink and is biased on by RC. The current passed through the
LED string, MOSFET and source resistor, develops a voltage across
RS that provides a bias to the NPN transistor. Consideration of the
expected linear mode power dissipation must be factored into the
design, with respect to the DLD101's thermal resistance.
VDS = VCC – VF LED String – VRS
PQ1 = VDS * ILED String
PWM dimming functionality can be effected by either driving the NPN
base via an additional resistor (thereby overriding the feedback from
RS) or by pulling the gate of the MOSFET down by direct connection.
The PWM control pulse stream can be provided by a micro-controller
or simple 555 based circuitry.
DLD101
Document number: DS32007 Rev. 6 - 2
5 of 7
www.diodes.com
February 2010
© Diodes Incorporated
5 Page | ||
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| PDF Descargar | [ Datasheet DLD101.PDF ] | |
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