TB62752BFUG(O,EL) Toshiba, TB62752BFUG(O,EL) Datasheet - Page 5

• Manufacturer Part Number: TB62752BFUG(O,EL)
• Description: IC LED DRIVR WHITE BCKLGT 6-SSOP
• Manufacturer: Toshiba
• Type: Backlight, White LEDr

Specifications of TB62752BFUG(O,EL)

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 770kHz ~ 1.43MHz
• Voltage - Supply: 2.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SC-74-6
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Efficiency: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: TB62752BFUGTR

Usage Precautions
Protection in LED Opened Condition
When the voltage of OVD terminal drops below 37 V (typ.), Nch MOS switching operation becomes available
again.
the IC is protected from unexpected over voltage.
Setting of External Capacitor
“Control of brightness” from the next page.
Setting of I
Setting of External Inductor Size
The operation with OVD terminal is available for the protection in case LED circuit opened.
When the voltage of OVD terminal is over 37 V (typ.), Nch MOS switching operation is disabled in the IC.
If load of LED is detached, Nch MOS switching operation is disabled with detection of boost circuit voltage and
Terminal for brightness control, recommended values are
The recommended values of the capacitors depend on the control of brightness. For details, please see the item
These recommended values reduce fluctuation of input current to up accuracy of brightness.
Resistance connects between RSENS pin and GND.
The average current is set by this RSENS value and average current are obtained by the following equation.
Current value error is within ±5%.
Please select the inductor size with referring this table corresponding to each number of LEDs.
[Recommended inductor values]
C
I
F
1
= Over 2.2 (µF), C
(mA)
Over 6
F
2 to 5
LEDs
=
RSENS
300
[mV]
[
Ω
]
2
= Over 1.0 (µF)
Indictor Size
10 µ H
22 µ H
LED current I
5
F
= 20 mA
Note
TB62752BFUG
2007-04-04