TB62736FUG Toshiba, TB62736FUG Datasheet - Page 4

• Manufacturer Part Number: TB62736FUG
• Manufacturer: Toshiba

Specifications of TB62736FUG

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

Protection at the time of LED opening
event the LED becomes open. As the IC does not incorporate a voltage protection circuit, it is strongly advised that
a zener diode be connected.
current when the LED becomes open, and to use a zener diode of lower tolerance.
The zener diode in the application circuit example is necessary for the provision of over-voltage protection in the
The zener diode should satisfy the following conditions:
Moreover, by connecting a protection circuit such as R_ZD in the figure below, it is possible to control the output
An example of IZD control by R_ZD connection. (RSENS = 16 Ω)
In order to avoid adverse effects on driver characteristics,
Toshiba recommends a resistance of 500 ohms or less.
i)
ii)
iii)
R_ZD (Ω)
Less than maximum output voltage of 24 V
Greater than the total series LED V
Less than the maximum output capacitance C
500
100
Around 0.6
Around 2.8
IZD (mA)
F
2
.
4
Protection circuit application
GND FB
SW
S-Di
IZD
TB62736FUG
RSENS
R_ZD
2010-06-24
I
F
1 μF
C2