TB62752BFUG Toshiba, TB62752BFUG Datasheet

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TB62752BFUG

Manufacturer Part Number
TB62752BFUG
Description
Manufacturer
Toshiba
Datasheet

Specifications of TB62752BFUG

Package
SOT23-6
Supply Voltage
2.8V to 5.5V
# Leds Supported
2 to 7 LEDs in series
Sw Frequency
1.0MHz
Led Current Accuracy
±5.0% (max)
Protection Feature
Output overvoltage protection
Other Features & Functions
-
Rohs Compatible Product(s) (#)
Available

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TB62752BFUG(0
Manufacturer:
TOSHIBA
Quantity:
2 700
Part Number:
TB62752BFUG(0,EL)
Manufacturer:
TOSHIBA
Quantity:
2 700
Part Number:
TB62752BFUG(O,EL)
Quantity:
3 166
Part Number:
TB62752BFUG,EL
Manufacturer:
Toshiba Semiconductor and Storage
Quantity:
106
Step Up Type DC-DC Converter for White LED
Converter specially designed for constant current driving of White
LED.
Li-ion battery.
and LED current (IF) is set with an external resistor.
of PDA, Cellular Phone, or Handy Terminal Equipment.
Features
Pin Assignment
The TB62752BFUG is a high efficient Step-Up Type DC-DC
This IC can drive 2-7 white LEDs connected series using a
This IC contains N-ch MOSFET Transistor for Coil-Switching,
This IC is especially for driving back light white LEDs in LCD
2-7 white LEDs connected series.
Variable LED current IF is set with a external resistor: 20 mA (typ.) @RSENS = 15 Ω
Output power: Available for 800 mW LED loading (VIN=2.8V, 7LEDs, I
High efficiency: 80% over (using recommended external parts)
Output over voltage shutdown function
: Switching operation is shut downed when OVD terminal voltage is over 29.0V (MIN).
IC package: SSOP6-P-0.95B
Switching frequency: 1.0 MHz (typ.)
Note: This IC could be destroyed in some case if amounted in 180° inverse direction.
Please be careful about IC direction in mounting.
1.
2. OVD
3. VIN
SHDN
(top view)
TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic
Week 1 to 26
TB62752BFUG
6. FB
5. GND
4. SW
1
1.
2. OVD
3. VIN
SHDN
Week 27 to 53
Weight: 0.016 g (typ.)
F
= Over 25 mA)
6. FB
5. GND
4. SW
TB62752BFUG
2011-06-08

Related parts for TB62752BFUG

TB62752BFUG Summary of contents

Page 1

... TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic Step Up Type DC-DC Converter for White LED The TB62752BFUG is a high efficient Step-Up Type DC-DC Converter specially designed for constant current driving of White LED. This IC can drive 2-7 white LEDs connected series using a Li-ion battery. This IC contains N-ch MOSFET Transistor for Coil-Switching, and LED current (IF) is set with an external resistor ...

Page 2

... SW Switch terminal for DC-DC converter. N-ch MOSFET built-In. 5 GND Ground terminal LED I setting resistor connecting terminal μ Driver I sens R Q COMP S Ramp 1.0 MHz generator oscillator Shutdown function GND Function Description F 2 TB62752BFUG OVD Over voltage detection FB Error AMP. . 2011-06-08 ...

Page 3

... I/O Equivalent Pin Circuits 1. SHDN Terminal VIN SHDN 1 3. VIN Terminal to GND Terminal VIN 3 GND Terminal VIN OVD Terminal OVD Terminal TB62752BFUG 2011-06-08 ...

Page 4

... Current value error is within ±5%. Setting of External Inductor Size Please select the inductor size with referring this table corresponding to each number of LEDs. [Recommended inductor values] LEDs Over 6 = 1.0 (μF) or more 2 Indictor Size Note 10 μ LED current μ TB62752BFUG 2011-06-08 ...

Page 5

... PWM: Ideal equation>> 300 [mV] × I [mA RSENS <<Recommended application>> VIN = 2.8 to 5.5 V PWM signal of charge depends on the constant number. And so Duty [%] [ Ω μ H S-Di VIN SW SHDN OVD FB GND 5 TB62752BFUG , arises in turning on. Take care in selecting the 2011-06-08 ...

Page 6

... LED current value goes over 100% of the current set with RSENS, if the input voltage after filtering is between 0 to 300 mV (typ.). <<Recommended application>> VIN = 2 μ H S-Di VIN SW SHDN OVD 16 k Ω FB GND 82 k Ω Analog voltage 22 μ H S-Di VIN SW SHDN OVD 16 k Ω Ω GND 0.1 μ Ω PWM signal 6 TB62752BFUG 2011-06-08 ...

Page 7

... RSENS [ ] RSENS[ Ω × 300 [mV] RSENS [ Ω RSENS[ Ω × 300 [mV] RSENS [ Ω × + RSENS [ ] R1[ ] RSENS[ Ω Ω × 300 [mV] × RSENS [ ] R1[ Ω 7 TB62752BFUG . R1[ ] Ω × ] R1[ Ω R2[ Ω ] × ] R2[ ] Ω × + × ] R2[ ] R1[ ] R2[ ] Ω Ω Ω Ω × ...

Page 8

... VIN = 4.2 V, RSENS = 150 Ω 25° μ H VIN = 3.6 V (typ.) Δ VIN = 3.0 to 5.0 V VIN = 3 3 SHDN V 9 OVD = OVD OVD 8 TB62752BFUG Unit °C/W °C °C °C Min Typ. Max ⎯ 2.8 5.5 ⎯ ⎯ 20 Min Typ. Max ⎯ 2.8 5.5 ⎯ ...

Page 9

... TB62752BFUG OVD VIN SHDN (OFF GND SW TB62752BFUG OVD VIN SHDN SHDN GND SW TB62752BFUG OVD VIN SHDN (SW GND SW TB62752BFUG OVD VIN SHDN TB62752BFUG 2011-06-08 ...

Page 10

... The locations of the pins differ from the actual ones to simplify the diagram. See page 1 for the actual pin locations OVD 10. I OVD 2 OVD TB62752BFUG GND SW TB62752BFUG OVD VIN SHDN GND SW TB62752BFUG OVD VIN SHDN 2011-06-08 ...

Page 11

... Package Dimensions Weight: 0.016 g (typ.) 11 TB62752BFUG 2011-06-08 ...

Page 12

... 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. 12 TB62752BFUG 2011-06-08 ...

Page 13

... 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. 13 TB62752BFUG ) at any time and J 2011-06-08 ...

Page 14

... 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 14 TB62752BFUG 2011-06-08 ...

Page 15

... 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. 15 TB62752BFUG 2011-06-08 ...

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