TB62736FUG Toshiba, TB62736FUG Datasheet

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TB62736FUG

Manufacturer Part Number
TB62736FUG
Description
Manufacturer
Toshiba
Datasheet

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) (#)
-

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TB62736FUG(0,EL)
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Step-up Type DC-DC Converter for White LEDs
The TB62736FUG is a high efficiency step-up type DC-DC
converter that is designed especially for use as a constant current
driver of white LEDs.
It is possible to drive 2 to 6 white LEDs connected in series using
a lithium-ion battery.
This IC incorporates an N-ch-MOS FET transistor required for
switching of an external inductor.
The forward current of the LEDs can be controlled by an external
resistor.
This IC is best suited for use as a driver of white LED back
lighting in color LCDs in PDAs, cellular phones and handy
terminal devices.
Features
Brightness control function with changing drive current:
LED current values controlled by external resistance
Output power
High efficiency
Switching Frequency
IC package: SSOP6-P-0.95B (SOT23-6)
LED current I
F
TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic
= 25% to 100% (analog input)
TB62736FUG
: 20 mA (typ.) @ RSENS=16 Ω
: 400 mW
: maximum 87% (when used with components as recommended herein)
: 1.1 MHz(Typ.)
1
Weight: 0.016 g (typ.)
TB62736FUG
2010-06-24

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TB62736FUG Summary of contents

Page 1

... TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic Step-up Type DC-DC Converter for White LEDs The TB62736FUG is a high efficiency step-up type DC-DC converter that is designed especially for use as a constant current driver of white LEDs possible to drive white LEDs connected in series using a lithium-ion battery ...

Page 2

... Off Time Control Mono Multi CTL AMP GND 4 SW Week Function = 25 to 100% Variable F = 100% F control (see p.5) F setting resistor connecting terminal TB62736FUG NC 2 CTL AMP Error AMP. 5 GND 6 SHDN 1 (NC) GND 3 4 VIN SW Week ...

Page 3

... I/O Equivalent Pin Circuits 1. SHDN pin VIN SHDN pin pin NC 2 The NC pin is not connected to any internal circuit, so placing it on another terminal pattern does not present a problem pin VIN TB62736FUG 2010-06-24 ...

Page 4

... LED becomes open, and to use a zener diode of lower tolerance. An example of IZD control by R_ZD connection. (RSENS = 16 Ω) R_ZD (Ω) IZD (mA) 500 Around 0.6 100 Around 2.8 In order to avoid adverse effects on driver characteristics, Toshiba recommends a resistance of 500 ohms or less GND FB Protection circuit application 4 TB62736FUG S-Di 1 μF SW IZD I F R_ZD RSENS 2010-06-24 C2 ...

Page 5

... PWM frequency should be 100 kHz. <<Output current is calculated using the following equation>> IF(mA equal to, or greater than 1.0 (μF). 2 Note = 100 SHDN input - output rate/output current VIN=3.0V 1.3 1.6 1.9 2.2 VSHDN(V) 325[mV] × ON Duty [%] RSENS [Ω] 5 TB62736FUG VSHDN>2.5 V Note 100 UNIT : % rate 2.5 2010-06-24 ...

Page 6

... SHDN (H) ⎯ V SHDN (L) ⎯ (SW) ⎯ (SW) ⎯ (SW 3 SENS 4.7 μ 3.6 V center IN ∆ 3 5 TB62736FUG Unit °C/W °C °C °C Min Typ. Max ⎯ 2.8 5.5 ⎯ 2.7 V ⎯ 0 0.5 ⎯ ⎯ Ω ⎯ ⎯ 25°C Min Typ ...

Page 7

... Efficiency Efficiency Output current in the range 4.6 4.9 5.2 5.5 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 7 TB62736FUG Evaluation conditions L : CXLD120 series (NEO MAX CO., Ltd.) 1 (Size: 2.5 mm × 3.0 mm × 1.2 mm C2012JB1E225K (TDK Corp C2012JB1E105K (TDK Corp.) 2 S-Di : CUS02 1 A/30 V (TOSHIBA Corp.) WLEDs : NSCW215T (NICHIA Corp.) Input Voltage - Efficiency/Output Current 5LED Drive, L=10μ ...

Page 8

... Efficiency Efficiency Output current in the range 3 4.6 4.9 5.2 5.5 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 8 TB62736FUG • Evaluation conditions L : 1001AS series (TOKO, INC) 1 (Size: 3.6 mm × 3.6 mm × 1.2 mm C2012JB1E225K (TDK Corp C2012JB1E105K (TDK Corp.) 2 S-Di : CUS02 1 A/30 V (TOSHIBA Corp.) WLEDs : NSCW215T (NICHIA Corp.) Input Voltage - Efficiency/Output Current 5LED Drive, L=10μ ...

Page 9

... Efficiency Efficiency Output current in the range 3 4.6 4.9 5.2 5.5 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 9 TB62736FUG • Evaluation conditions L : LQH2M series 1 (Murata Manufacturing Co.,Ltd.) (Size: 2.0 mm × 1.6 mm × 0.95 mm C2012JB1E225K (TDK Corp C2012JB1E105K (TDK Corp.) 2 S-Di : CUS02 1 A/30 V (TOSHIBA Corp.) WLEDs : NSCW215T (NICHIA Corp.) Input Voltage - Efficiency/Output Current 5LED Drive, L=10μ ...

Page 10

... Efficiency Efficiency Output current in the range 3 4.6 4.9 5.2 5.5 2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 10 TB62736FUG • Evaluation conditions L : VLF3010A series (TDK Corp.) 1 (Size: 3.0 mm × 3.0 mm × 1.0 mm C2012JB1E225K (TDK Corp C2012JB1E105K (TDK Corp.) 2 S-Di : CUS02 1 A/30 V (TOSHIBA Corp.) WLEDs : NSCW215T (NICHIA Corp.) Input Voltage - Efficiency/Output Current 5LED Drive, L=10μ ...

Page 11

... VIN(V) Input Voltage - Efficiency/Output Current 2LED Drive, L=5.1μ Iout Efficiency Efficiency 10 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 VIN(V) 11 TB62736FUG : 32R51 (KOA Corp.) (Size: 3.2 mm × 2.5 mm × 0.6 mm) : C2012JB1E225K (TDK Corp.) : C2012JB1E105K (TDK Corp.) : CUS02 1 A/30 V (TOSHIBA Corp.) 100 5.2 5.5 100 5.2 5.5 2010-06-24 ...

Page 12

... Package Dimensions Weight: 0.016 g (typ.) 12 TB62736FUG 2010-06-24 ...

Page 13

... DC voltage will increase. If this output voltage is connected to a speaker with low input withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The over current can cause smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied Load (BTL) connection type IC that inputs output DC voltage to a speaker directly. 13 TB62736FUG 2010-06-24 ...

Page 14

... If the current sink capability of the power supply is small, the device’s motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in system design. 14 TB62736FUG ) at any time and J 2010-06-24 ...

Page 15

... Use of Sn-37Pb solder Bath solder bath temperature: 230°C dipping time: 5 seconds the number of times: once use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath solder bath temperature: 245°C dipping time: 5 seconds the number of times: once use of R-type flux 15 TB62736FUG 2010-06-24 ...

Page 16

... Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product. Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 16 TB62736FUG 2010-06-24 ...

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