TB62756FUG Toshiba, TB62756FUG Datasheet - Page 5

• Manufacturer Part Number: TB62756FUG
• Manufacturer: Toshiba

Specifications of TB62756FUG

• Package: SOT23-6
• Supply Voltage: 2.8V to 5.5V
• # Leds Supported: 2 to 6 LEDs in series
• Sw Frequency: 1.1MHz
• Led Current Accuracy: ±5.23% (max)
• Protection Feature: -
• Other Features & Functions: -
• Rohs Compatible Product(s) (#): -

Output-side Capacitor Setting
External Inductor Size Setting
Control of I
Dimming using PWM Signal Input
It is recommended that the value of C
For each number of LEDs, the selected inductance should be greater than the value indicated in the table below.
The resistance R
The average current is controlled by the R
Margin of error is ±5%.
A dimming function can also by applied using a PWM signal.
[Notes]
<<Output current is calculated using the following equation>>
•
•
•
Number of LEDs
When using a PWM signal, the minimum pulse width of the PWM should be greater than 33 μs.
Duty ratio of PWM function should be set at 10% to 90%.
The recommended PWM frequency should be 100 Hz to 10 kHz.
I
I
F
F
2
3
4
5
6
(mA) = [325 mV/R
(
mA
F
)
SENS
=
325
Inductance (Unit: μ H)
[
is connected between the FB pin and the GND pin.
mV
R
SENS
× ]
SENS
ON
4.7
6.8
10
[
Ω
Duty
(Ω)]
]
2
[%]
be equal to, or greater than 1.0 (μF).
SENS
I
F
value, and calculated using the following equation:
= 20 mA
Note
5
TB62756FUG
2010-06-27