UP6034PSUD [UPI]
4 Channel High Current Balance LED Driver;
| 型号： | UP6034PSUD |
| 厂家： | 
uPI Semiconductor Corp. |
| 描述： | 4 Channel High Current Balance LED Driver |
| 文件： | 总12页 (文件大小：165K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
uP6034
4 Channel High Current Balance LED Driver
Features
General Description
4.5V to 33V Input Voltage Range
Support to 4-channel LED String
The uP6034 consists of a high efficiency boost converter
and four current balance controllers. It supports 4-channel
LED string designed for LED backlight unit. The current
matching function provides LED backlight unit with better
brightness uniformity. The uP6034 can optimize LEDoutput
voltage for getting better boost converter efficiency.
100kHz to 1MHz Adjustable Switching Frequency
100Hz to 20kHz PWM Dimming
20 to 160mA Adjustable LED Channel Current
Status Output
The uP6034 has a wide input supply voltage from 4.5V to
33V, adjustable LEDcurrent from 20mAto 160mAfor each
strings, adjustable switching frequency from 100kHz to
1MHz by external resistor and supports external PWM
dimming from 100Hz to 20kHz.
Output Short Circuit and Open Schottky Diode
Protection
LED Short Protection
LED Open String Protection
Adjustable Over Voltage Protection
Over Temperature Protection
Over Current Protection
The uP6034 includes over voltage protection, cycle by cycle
current limit and over temperature protection. It supports
LEDopen string, LEDshort and light bar short protection.
Output shorted circuit to ground and open Schottky diode
detection to prevent Power MOS damage.
Applications
Monitor LED Backlight
TV LED Backlight
Ordering Information
Order Number
uP6034PTUD
uP6034PSAD
uP6034PSUD
Package
TSSOP-16L
SOP-16L
Top Marking
uP6034P
uP6034P
uP6034P
Remark
With Exposed PAD
--
PSOP-16L
With Exposed PAD
Note:
(1) Please check the sample/production availability with uPI representatives.
(2) uPI products are compatible with the current IPC/JEDEC J-STD-020 requirement. They are halogen-free, RoHS
compliant and 100% matte tin (Sn) plating that are suitable for use in SnPb or Pb-free soldering processes.
Pin Configuration
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CH1
CH2
GND
CH3
CH4
ISET
OVP
RT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PWM
SSTCMP
STATUS
VIN
CH4
ISET
OVP
RT
CH3
CH4
ISET
OVP
RT
CH3
GND
GND
CH2
CH2
CH1
CH1
PGND
PGND
VREF
LDR
EN
PWM
SSTCMP
STATUS
VIN
EN
PWM
SSTCMP
STATUS
VIN
ISW
LDR
VREF
ISW
LDR
VREF
ISW
EN
TSSOP-16L
SOP-16L
PSOP-16L
uP6034-DS-F00A0, Jul. 2018
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uP6034
Functional Pin Description
Pin No. Pin No. Pin No.
Pin Name Pin Function
PTUD
PSAD
PSUD
LED Current Sense Input. Leave the pin unconnected if not being used.
LED Current Sense Input. Leave the pin unconnected if not being used.
IC Ground.
1
2
3
4
5
13
13
CH1
CH2
GND
CH3
CH4
14
14
15
15
LED Current Sense Input. Leave the pin unconnected if not being used.
LED Current Sense Input. Leave the pin unconnected if not being used.
16
16
1
1
LED Current Set Pin. Connect a resistor to GND to set the LED strings
current.
6
7
8
2
3
4
2
3
4
ISET
OVP
RT
Over Voltage Protection Sense Pin.
Switching Frequency Set Pin. This pin sets the switching frequencywith
a resistor ranging from 100kHz to 1MHz.
Enable Pin. Active high. When low, the device is turned off.
Power MOSFET Current Sense Pin.
Power MOSFET Gate Driver.
9
5
6
5
6
EN
ISW
10
11
12
13
14
15
16
7
7
LDR
5V Output For External Circuits.
8
8
VREF
VIN
Input Supply Voltage Pin.
9
9
LED Converter Operation Status Output.
Soft Start And Control Loop Compensation.
PWM Dimming Control Input.
10
11
12
10
11
12
STATUS
SSTCMP
PWM
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uP6034
Typical Application Circuit
VLED
SS35
VIN
10uH
QM6008D
4.4uF
0.05
ROVP1
1M
100
0
0
LDR ISW
VIN
VREF
OVP
2.2uF
10k
1uF
ROVP2
51k
100k
STATUS
EN
2.2uF
EN
470k
1000pF
CH1
CH2
CH3
CH4
10k
PWM
PWM
SSTCMP
RT
ISET
RCOMP
100
RRT
100k
RISET
12k
CCOMP1
470nF
1000pF
GND
Functional Block Diagram
VREF
ISW LDR
VIN
EN
Reference
OSC
Boost Controller
RT
ISW
SSTCMP
OTP
STATUS
CH1
PWM
ISET
Current
Controller
CH2
Current
setting
CH3
CH4
OVP Protection
OVP
GND
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uP6034
Functional Description
The uP6034 is a 4-Channel LEDcurrent matching controller threshold voltage, the boost converter turns the Power MOS
for LEDTVbacklight unit. It supports wide range input voltage switch off. The internal switch will be turned on again once
from 4.5V to 33V. The LED current can adjust from 20mA the voltage at OVP pin drops below its threshold voltage.
to 160mA by external resistor. The switching frequency The over voltage protection set voltage is divided by ROVP1
can adjust from 100kHz to 1MHz. It supports external PWM and ROVP2 resistors.
dimming frequency from 100Hz to 20kHz. The uP6034 has
built-in over current protection, over voltage protection, over
temperature protection, LED short protection, LED open
ROVP1
OVPSET = OVPTH ×(1+
)
ROVP2
string protection, output short circuits protection and Over Current Protection:
SchottkyDiode open protection.
The boost converter has over current protection to limit
peak inductor current. It prevents large current damaging
the inductor and diode.During the ON-time, when ISW pin
reaches 0.54V, the LDR will turn off immediately. Actual
current limit is always larger than the nominal value because
of the internal circuit delay. Current limit is also affected
by the input voltage, duty cycle, and inductor value.
Setting Switching Frequency
The uP6034 switching frequency is adjustable. The
switching frequency can be adjusted by RT pin resistor
RRT to GND.
50
fOSC(MHZ) =
RRT(kΩ)
Output Short Circuit/Schottky Diode Open Protection:
Adjustable LED Current:
The LEDcurrent can be set by the following equation:
1200
When OVP pin voltage is less than 0.1V threshold, LDR
will turn off. It prevents the components from damage when
output shorted to ground or Schottky diode open
conditions.
ILED(mA) =
RISET(kΩ)
Shut down Under Abnormal Condition:
RISET is the resistor between ISET pin andGND.
When OVP pin voltage is greater than 3V, the IC will shut
down and latch unless switching the EN to reset IC.
External PWM Dimming:
The uP6034 supports PWM dimming function. The uP6034
brightness control is determined by the signal on the PWM
pin with a suggested PWM frequency range from 100Hz to
20kHz.
Status Ouput:
The STATUS will output a logic low if any of the below
conditions exists:
1) Over voltage protection
2) LED short protection
LED Short Protection:
If any string of CH1~CH4 voltage exceeds a threshold of
approximately 8.5V during the normal operation, the 3) Any string is open
corresponding string will be turned off and latched.
4) Over temperature protection
LED Open Protection:
Over Temperature Protection:
If any string is open, the output voltage will boost up until
the OVP pin voltage is approximately 2V threshold. The IC
will ignore the open string and other strings will be in normal
operation. If all strings are open and the OVP pin voltage
reaches 2V threshold, the LDR will turn off and IC will shut
down and latch.
When the junction temperature exceeds 140OC, all the
blocks will be turned off. Once the temperature cools down
to approximately 110OC, IC will resumes normal operation.
Adjustable Over Voltage Protection:
The uP6034 has adjustable over voltage protection. The
boost converter with an integrated over voltage protection
prevents the components from exceeding the absolute
maximum voltage rating. When the OVP reaches the
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uP6034
Absolute Maximum Rating
(Note 1)
Supply Input Voltage toGND--------------------------------------------------------------------------------------------------- -0.3V to +40V
EN, PWM, OVP, STATUS, VREF toGND----------------------------------------------------------------------------------------- -0.3Vto +7V
ISET, RT, SSTCMP, LDR toGND ---------------------------------------------------------------------------------- -0.3V to (VREF+0.3)V
CH1~CH4 toGND(No Switching) ----------------------------------------------------------------------------------------------------- -0.3Vto 60V
ISW toGND --------------------------------------------------------------------------------------------------------------------------- -0.3V to 50V
CH1~CH4 Current ---------------------------------------------------------------------------------------------------------------------------------------- 200mA
StorageTemperature Range ------------------------------------------------------------------------------------------------------------ -65oC to +150oC
JunctionTemperature ------------------------------------------------------------------------------------------------------------------------------------ 150oC
LeadTemperature (Soldering, 10 sec) ------------------------------------------------------------------------------------------------------------ 260oC
ESD Rating (Note 2)
HBM (Human Body Mode) --------------------------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------------------------------------------- 200V
Thermal Information
Package Thermal Resistance (Note 3)
TSSOP -16L (with Exposed PAD) θJA --------------------------------------------------------------------------------------------- 38OC/W
TSSOP-16L(with Exposed PAD) θJC ---------------------------------------------------------------------------------------------- 10OC/W
SOP -16L θJA ------------------------------------------------------------------------------------------------------------------ 110OC/W
SOP -16L θJC ------------------------------------------------------------------------------------------------------------------ 30OC/W
PSOP -16L θJA ------------------------------------------------------------------------------------------------------------------ 45OC/W
PSOP -16L θJC ------------------------------------------------------------------------------------------------------------------ 3OC/W
PowerDissipation, PD @ TA = 25°C
TSSOP-16L(withExposedPAD) ----------------------------------------------------------------------------------------------------------- 2.63W
SOP -16L ------------------------------------------------------------------------------------------------------------------ 0.91/W
PSOP -16L ------------------------------------------------------------------------------------------------------------------ 2.22/W
Recommended Operation Conditions
(Note 4)
InputVoltage ------------------------------------------------------------------------------------------------------------------------------------ 4.5Vto +33V
EN, PWM, OVP, STATUS, VREF toGND---------------------------------------------------------------------------------- 0V to +5.5V
ISET, RT, SSTCMP, LDR to GND -------------------------------------------------------------------------------------- 0V to VREF
CH1~CH4 LED Current ---------------------------------------------------------------------------------------------------------- 20mA to 160mA
PWM Frequency ------------------------------------------------------------------------------------------------------------------ 100Hz to 20kHz
Switching Frequency -------------------------------------------------------------------------------------------------------- 100kHz to 1MHz
Operating Junction Temperature Range ---------------------------------------------------------------------- -40oC to +125oC
OperatingAmbient Temperature Range ------------------------------------------------------------------------------ -40oC to +85oC
Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. Functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum
rating conditions for extended periods may remain possibility to affect device reliability.
Note 2. Devices are ESDsensitive. Handling precaution recommended.
Note 3. θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of
JEDEC 51-3 thermal measurement standard.
Note 4. The device is not guaranteed to function outside its operating conditions.
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uP6034
Electrical Characteristics
(VIN = 24V, TA = 25oC, unless otherwise specified)
Parameter
Symbol
IOP
Test Conditions
EN = 5V, PWM = 5V
Min
--
Typ
--
Max Units
VIN Operation Current
10
5
mA
uA
uA
V
VIN Shutdown Current
ISHDN
ISTB
EN = 0V, PWM = 0V
EN = 5V, PWM = 0V
VREFLOCKOUT
--
--
VIN Standby Current
--
--
220
--
Under Voltage Lockout Logic
Under Voltage Lockout Resume
VREF Reference Voltage
VREF Output Current Capability
VLCK
--
3.6
4
VRSM VREFRESEUME
--
--
V
VREF
4.85
--
5
5.15
30
V
VVREF
--
mA
Logic High Input
Voltage(EN,PWM)
VIH
VIL
VIN = 4.5V to 33V
VIN = 4.5V to 33V
RT = 100kΩ
2.4
--
--
--
--
V
V
Logic Low Input Voltage(EN,
PWM)
0.7
Switching Frequency
fosc
R
450
20
40
1
500
50
80
3.5
5
550
80
120
5
kHz
ns
ns
Ω
Minimum MOSFET ON Time
Minimum MOSFET OFF Time
LDR Sink Resistance
Tm_ON
Tm_OFF
RLDR_SK
RLDR_SC
LDR Source Resistance
1
9
Ω
N-Channel MOSFET Over
Current Protection
VISW
0.48 0.54
0.6
V
Regulation LED Current per
Channel
ISET
RISET = 12kΩ
95
--
100
105
mA
%
LED Current Matching
+/- 1.5 +/- 3
ILEDM
Over Voltage Protection
Threshold
VOVP
1.9
2.0
2.1
V
Shun Down Under Abnormal
Condition
VOVP
VSHT
2.8
7.8
3
3.2
9.2
V
V
LED Short Protection Threshold
Ch1~CH4
8.5
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uP6034
Typical Operation Characteristics
Power ON from EN
VOUT Ripple
VIN(10V/Div)
VEN(2V/Div)
LDR(5V/Div)
VOUT (20V/Div)
VOUT(200mV/Div)
I-LED (100mA/Div)
I-LED (100mA/Div)
10ms/Div
5us/Div
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA)
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA), COUT = 56uF
PWM Dimming Waveform
PWM Dimming Waveform
LDR(5V/Div)
PWM(5V/Div)
LDR(5V/Div)
PWM(5V/Div)
I-LED (200mA/Div)
I-LED (200mA/Div)
2ms/Div
2ms/Div
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA), PWM = 200Hz. Duty = 50%
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA), PWM = 200Hz. Duty = 10%
PWM Dimming Waveform
PWM Dimming Waveform
LDR(5V/Div)
PWM(5V/Div)
LDR(5V/Div)
PWM(5V/Div)
I-LED (200mA/Div)
I-LED (200mA/Div)
200us/Div
200us/Div
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA), PWM = 2KHz. Duty = 50%
18WLED, VIN = 24V, I-LED = 240mA
(Per String =60mA), PWM = 2KHz. Duty = 10%
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uP6034
Application Information
Inductor Selection
Power MOS Selection
Inductor selection should consider the inductor value, rated The Power MOS Vds voltage rating should be higher than
current,DCR, size, and cost. The main parameter for inductor the maximum output voltage of the boost converter. The
selection is saturation current of the inductor which should Ids current rating should be higher than the current limit of
be higher than the minimum switch current limit. The the boost converter.
inductor should have low core loss at and lowDCR for better
efficiency.
PCB Layout
For best performance of the uP6034, the following guidelines
must be strictly followed.
Output Capacitor Selection
For the best output voltage filtering, the low ESR of output
1. Minimize the high-current and switching paths loop,
capacitor is recommended. The X5R, X7R ceramic
made the trace width enough to avoid the EMI and
capacitors are suitable for uP6034 applications. The output
stability problems. Keep input capacitor, inductor, LX-
pin, Schottky diode and output capacitor placement
voltage ripple can be calculated as below:
be in the shortest area.
⎛
⎜
⎜
⎞
⎟
⎟
⎠
IOUT
IPxL
1
∆VOUT
=
−
+ IPxESR
2. Avoid using vias in the high-current paths. If vias are
unavoidable in the high-current paths, use many vias
in parallel to reduce resistance and inductance.
COUT FS VOUT + VD − V
IN
⎝
IOUT: load current
3. Place the VINand VREF pin bypass capacitors as close
as possible to the uP6034. The ground of VINcapacitor
should be connected directly to theGNDthat near the
IC.
COUT: selected output capacitor
FS: switching frequency
IP: delta switching current
L: selected inductor value
VD: rectifier diode forward voltage
ESR: output capacitor ESR value
4. Minimize the length and maximize the width of the
traces between the output capacitors and the load for
best transient responses.
5. Place the output voltage divider resistors near the OVP
pins. Keep the feedback resistors and trace far away
from the high-current and switching loops to avoid the
noise coupling.
Diode Selection
To achieve high efficiency, the Schottky diode with low
forward voltage and fast reverse recovery time are the ideal
choices for uP6034. The voltage rating should be higher
than the maximum output voltage of the boost converter.
The average forward current rating should be higher than
the current limit of the boost converter.
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uP6034-DS-F00A0, Jul. 2018
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uP6034
Package Information
TSSOP - 16L with Exposed PAD
4.90 - 5.10
2.20 - 3.20
0.65 BSC
0.19 - 0.30
1.20 MAX
0.00 - 0.15
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
uP6034-DS-F00A0, Jul. 2018
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9
uP6034
Package Information
SOP - 16L
9.80 - 10.01
1
1.27 BSC
0.35 - 0.49
1.35 - 1.75
0.10 - 0.25
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
10
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uP6034
Package Information
PSOP - 16L
1
1.27 BSC
0.35 - 0.49
1.75 MAX
0.00 - 0.25
Note
1.Package Outline UnitDescription:
BSC: Basic. Represents theoretical exact dimension or dimension target
MIN: Minimum dimension specified.
MAX: Maximum dimension specified.
REF: Reference. Represents dimension for reference use only. This value is not a device specification.
TYP. Typical. Provided as a general value. This value is not a device specification.
2.Dimensions in Millimeters.
3.Drawing not to scale.
4.These dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.15mm.
uP6034-DS-F00A0, Jul. 2018
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11
uP6034
Important Notice
uPI and its subsidiaries reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products
and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information
before placing orders and should verify that such information is current and complete.
uPI products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment. However, no responsibility
is assumed by uPI or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patent or patent rights of uPI or its subsidiaries.
COPYRIGHT (C) 2011, UPI SEMICONDUCTOR CORP.
uPI Semiconductor Corp.
Sales Branch Office
uPI Semiconductor Corp.
Headquarter
12F-5, No. 408, Ruiguang Rd. NeihuDistrict,
Taipei Taiwan, R.O.C.
TEL : 886.2.8751.2062 FAX : 886.2.8751.5064
9F.,No.5, Taiyuan 1st St. Zhubei City,
Hsinchu Taiwan, R.O.C.
TEL : 886.3.560.1666 FAX : 886.3.560.1888
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