LM2794TL National Semiconductor, LM2794TL Datasheet - Page 2

• Manufacturer Part Number: LM2794TL
• Description: IC LED DRVR WHT BCKLT 14MICROSMD
• Manufacturer: National Semiconductor

Specifications of LM2794TL

• Constant Current: Yes
• Topology: PWM, Switched Capacitor (Charge Pump), Step-Up (Boost)
• Number Of Outputs: 4
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 325kHz ~ 675kHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 3.8V
• Mounting Type: Surface Mount
• Package / Case: 14-UFBGA
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 20mA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM2794TL; LM2794TLCT

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Standard Micro SMD Package:
Thin Micro SMD Package:
E3,E5,E7,D6
Connection Diagram
Ordering Information
Pin Description
(*) Note that the pin numbering scheme for the Micro SMD package was revised in April, 2002 to conform to JEDEC standard. Only the pin numbers were revised.
No changes to the physical location of the inputs/outputs were made. For reference purpose, the obsolete numbering had C1+ as pin 1, C1- as pin 2, VIN as pin
3, GND as pin 4, C2- as pin 5, D1-D4 as pin 6,7,8 & 9, Iset as pin 10, BRGT as pin 11, SD as pin 12, C2+ as pin 13, Pout as pin 14
Order Number
Order Number
Pin(*)
LM2794BLX
LM2795BLX
LM2794TLX
LM2795TLX
LM2794BL
LM2795BL
LM2794TL
LM2795TL
A1
B2
C1
D2
E1
C7
B6
A7
A5
A3
BRGT
Name
D1−4
P
GND
C1+
C1−
C2−
I
C2+
V
SD
SET
OUT
Shutdown Polarity
Shutdown Polarity
IN
Active High
Active High
Active High
Active High
Active Low
Active Low
Active Low
Active Low
Positive terminal of C1
Negative terminal of C1
Power supply voltage input
Power supply ground input
Negative terminal of C2
Current source outputs. Connect directly to LED
Current Sense Input. Connect 1% resistor to ground to set constant current through LED
Variable voltage input controls output current
The LM2794 has an active-low shutdown pin (LOW = shutdown, HIGH = operating). The
LM2795 has an active-high shutdown pin (HIGH = shutdown, LOW = operating) that has a
pull-up to V
Positive terminal of C2
Charge pump output
IN
Package Number
Package Number
.
BLP14EHB
BLP14EHB
BLP14EHB
BLP14EHB
TLP14EHA
TLP14EHA
TLP14EHA
TLP14EHA
Bottom View
2
Function
Package
Package
Marking
Marking
I LOG
I LOG
I LOG
I LOG
I LOJ
I LOJ
I LOJ
I LOJ
20028523
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Supplied As
Supplied As