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TK65600B PDF даташит

Спецификация TK65600B изготовлена ​​​​«Toko America Incorporated» и имеет функцию, называемую «Inductive White Led Driver».

Детали детали

Номер произв TK65600B
Описание Inductive White Led Driver
Производители Toko America Incorporated
логотип Toko America Incorporated логотип 

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TK65600B Даташит, Описание, Даташиты
www.DataSheet4U.com
TK65600B
ADVANCED
INFORMATION
FEATURES
n Minimum External Components
n Efficiency as High as 80%
n LED Current Regulated
n Internal Synchronous Rectifer
n PWM Signal Intensity Control
n Can Drive Mulitple Strings of 3 WLED in Series
n 700 kHz PWM Operation
n Low Supply Current
n Enable Pin
n Short Circuit Protection
n Over Voltage Protection
n 8 Pin Flip Chip Package
DESCRIPTION
Toko’s TK65600 White LED Driver IC has been optimized for
battery controlled systems where power consumption and
size are primary concerns. High efficiency has been opti-
mized for this application.
The miniature Flip Chip package device, together with the
miniature Toko Coil D31FB or Low Profile D412F Coil, further
helps system designers reduce the space required to drive
the white LEDs.
The IC uses Current-mode PWM (Pulse Width Modulation)
method of regulating the current through the string of LEDs.
This time-proven method of regulation works at a fixed
switching frequency which is preferred in RF systems,
because the switching noise RF spectrum is more predict-
able. With a switching frequency of 700 kHz the operation of
the IC should not disturb 455 kHz IF subsystem.
INDUCTIVE WHITE LED DRIVER
WITH SYNCHRONOUS RECTIFER
APPLICATIONS
n LCD Modules
n Cellular Telephone
n Battery Powered Systems
n Consumer Electronics
The Enable pin can take a PWM signal provided by the user
to reduce the display brightness. A PWM signal is prefered
to pulse the LEDs with a regulated value of current and to
maintain better consistency of chromaticity.
AGND A1
TK65600B
Top View
ENABLE
A2
A3 N/C
VDD B1
B3 FB
VOUT C1
C3 PGND
C2
IND
BLOCK DIAGRAM
VDD
B1
IND
C2
ORDERING INFORMATION
TK65600B
Tape/Reel Code
Package Code
TAPE/REEL CODE
PACKAGE CODE
ENABLE A2
ENABLE
OSC
VREF
GATE DRIVE
PWM
SCP/OVP
A1
AGND
C3
PGND
C1 VOUT
B3 FB
July 2, 2003 TOKO, Inc.
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TK65600B Даташит, Описание, Даташиты
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TK65600B
ADVANCED INFORMATION
ABSOLUTE MAXIMUM RATINGS
All Pins except IND, VOUT and GND ........................... 6 V
IND, and V PINs ............................................... 16.5 V
OUT
Storage Temperature Range ..................... -55 to +150 °C
Operating Temperature Range ..................... -30 to +85 °C
Junction Temperature TJMax (Note 3) ..................... 150 °C
Package Power Dissipation T = 25°C (Note 3) .... 560mW
A
θJA Thermal Resistance (Note 3) ......................... 220°C/W
TK65600B ELECTRICAL CHARACTERISTICS
VDD = 3.7 V, TA = Tj = 25 °C, unless otherwise specified.
SYMBOL
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNITS
VDD
IDD
ISTB
VEN(on)
VEN(off)
IEN
Input Supply Range
Quiescent Current in VDD PIN VEN ³ 1.2 V
Standby Current
VEN £ 0.3 V
Enable Full On Voltage
Output on
Enable Off Voltage
Enable Pin Current
Output off
ILIM
RDS(ON)
OVP
RSYNCH
Boost FET Current Limit
Setting
T = -30 to +85°C (Note 4)
A
Boost FET On Resistance
Over Voltage Protection
Synchronous Rectifier on
Resistance
No Load
TA = -30 to +85°C (Note 4)
VFB
Feedback Reference
Voltage
TA = -30 to +85°C (Note4)
ILED(SET)
Average Current flowing
through LED
VEN ³ 1.2 V,
(Sense resistor = 33.2Ω, 1%)
ILED(VAR)
Variation of Average Current
through LED
VEN 1.2V
2.7V < VIN < 5.5 V
ILED(LINE) ILED LINE Regulation
VEN 1.2V 2.7V < VIN < 5.5 V
ILED = 15 mA (Note 1)
2.7 3.7 5.5 V
150 500 µA
2 µA
1.2
VDD
+0.3
V
-0.3 0.3 V
-5 µA
400 mA
1.5
13.5 14.5
15.5
V
0.46
3.0
0.5
0.53
V
14 15
16 mA
-1.5 ILED(SET) +1.5
%
0.161 mA/V
Page 2
July 2, 2003 TOKO, Inc.









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TK65600B Даташит, Описание, Даташиты
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ADVANCED INFORMATION
TK65600B
TK65600B ELECTRICAL CHARACTERISTICS
VDD = 3.7 V, TA = Tj = 25 °C, unless otherwise specified.
SYMBOL
FBOOST
DC(MAX)
VOUT
P
OUT MAX
EFF
TSTART
PARAMETER
TEST CONDITIONS
Boost Frequency
Boost Maximum Duty
Cycle
Output Voltage Ripple
TA = -30 to +85°C (Note 4)
TA = -30 to +85°C (Note 4)
(Note 1)
Maximum Power Output
Boost Converter Efficiency
Start-Up Settling Time
V = 3V
IN
TA = -30 to +85°C (Note4)
ILED =15mA (Note 1,2)
L=27 µH D31FB
ILED =15mA (Note 1,2)
L=22 µH D3313FB
(Note 1)
MIN
575
300
TYP
700
MAX
825
UNITS
kHz
85 95
%
50 mV
mW
78
72
300
%
%
µs
Note 1: When using test circuit below.
Note 2: Converter efficiency is partly dependent upon the DC resistance of inductor L1. Higher DC resistances will result in
lower converter efficiency.
Note 3: The Absolute Maximum Power Dissipation depends upon the Ambient Temperature and can be calculated using the
formula PDMAX =(TJMAX -TA) /θJA
Note 4: Verified by design.
TYPICAL APPLICATION AND TEST CIRCUIT
AGND A1
VBAT T ERY
1 µF
TK65600B
Top View
VDD B1
VOUT C1
ENABLE
A2
A3 N/C
B3 FB
C2
IND
C3 PGND
33
July 2, 2003 TOKO, Inc.
L=D3313FB-22µH Coil
22 µH
1 µF
Page 3










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