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UBA3070TのメーカーはNXP Semiconductorsです、この部品の機能は「LED backlight driver IC」です。 |
部品番号 | UBA3070T |
| |
部品説明 | LED backlight driver IC | ||
メーカ | NXP Semiconductors | ||
ロゴ | |||
このページの下部にプレビューとUBA3070Tダウンロード(pdfファイル)リンクがあります。 Total 16 pages
UBA3070
LED backlight driver IC
Rev. 3 — 9 December 2010
Product data sheet
1. General description
The UBA3070 driver IC is the first member of a first generation of power-efficient LED
backlight driver ICs. Highly efficient, flexible and reliable LED drivers can easily be
designed using the UBA3070 control IC.
2. Features and benefits
Switch-mode buck controller that drives strings of LEDs up to 600 V power-efficiently
Controller with power-efficient Boundary Conduction Mode (BCM) operation:
Virtually no reverse recovery losses in freewheel diode
Zero Current Switching (ZCS) at switch, switch-on
Zero voltage or valley switching at switch, switch-on
Minimal required inductance value and size
Suitable for direct Pulse Width Modulation (PWM) dimming
Fast transient response through cycle-by-cycle current control, thereby:
Preventing over or undershoots in the Light Emitting Diode (LED) current
Enabling efficient PWM dimming by quickly turning the converter on and off and
thus removing the need for extra dimming switches and high-side drivers
Single controlled input voltage required for all UBA3070 driven LED strings in RGB or
white backlighting units
No binning on LED forward voltage required
Protections:
UnderVoltage LockOut (UVLO)
Leading Edge Blanking (LEB)
OverCurrent Protection (OCP)
OverTemperature Protection (OTP)
Low cost LED driver solution:
No fast-switching Schottky diode required due to ZCS
No dimming switch or high-side driver required for PWM dimming
Operates with smaller inductor then a comparable fixed-frequency Continuous
Conduction Mode (CCM) controller
3. Applications
The UBA3070 is suitable for high voltage LED lighting application:
LED backlighting in LCD televisions and monitors
General lighting applications
The UBA3070 application is most efficient when driving long LED strings
1 Page NXP Semiconductors
Vsupply
UBA3070
LED backlight driver IC
PWM
12 V
VCC 1
8 DRAIN
GND
2
HVS
7
PWM UBA3070 GATE
36
MASK 4
5 SENSE
Fig 2. Basic application diagram
6. Pinning information
6.1 Pinning
014aaa092
VCC 1
GND 2
PWM 3
UBA3070
8 DRAIN
7 HVS
6 GATE
MASK 4
5 SENSE
014aaa094
Fig 3. Pin configuration SO8
6.2 Pin description
Table 2.
Symbol
VCC
GND
PWM
MASK
SENSE
GATE
HVS
DRAIN
Pin description
Pin S08
1
2
3
4
5
6
7
8
Description
supply voltage
ground
PWM input voltage
masking input voltage
resistor programmable current sense input
gate driver output
high voltage safety spacer: not connected
drain of external MOSFET switch: input for valley sensing
UBA3070
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 9 December 2010
© NXP B.V. 2010. All rights reserved.
3 of 16
3Pages NXP Semiconductors
UBA3070
LED backlight driver IC
8. Limiting values
Table 3. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol Parameter
Conditions
Min
Voltages
VCC
VPWM
VMASK
VSENSE
VDRAIN
Currents
supply voltage
voltage on pin PWM
voltage on pin MASK
voltage on pin SENSE
voltage on pin DRAIN
current limited
current limited
current limited
−0.4
−0.4
−0.4
−0.4
−0.4
IPWM
IMASK
ISENSE
IGATE
IDRAIN
General
current on pin PWM
current on pin MASK
current on pin SENSE
current on pin GATE
current on pin DRAIN
d < 10 %
-
−250
−1
−0.8
-
Ptot
Tstg
Tj
ESD
total power dissipation
storage temperature
junction temperature
Tamb < 70 °C
-
−55
−40
VESD
electrostatic discharge
-
voltage
all pins except pins [2] -
DRAIN and VCC;
HBM class 1
pins DRAIN and VCC; [2]
HBM class 1
-
any pin; MM
[3] -
Max
+20
+5
-
-
+650
5
+250
+10
+2
5
0.5
+150
+145
-
2000
1500
200
Unit[1]
V
V
V
V
V
mA
μA
mA
A
mA
W
°C
°C
-
V
V
V
[1] All voltages are measured with respect to ground; positive currents flow into the UBA3070 IC. The VCC pin
may not be current driven. The voltage ratings are valid provided other ratings are not violated. The current
ratings are valid provided the maximum power rating is not violated.
[2] Human Body Model (HBM): equivalent to discharging a 100 pF capacitor through a 1.5 kΩ resistor.
[3] Machine Model (MM): equivalent to discharging a 200 pF capacitor through a 0.75 μH coil and a 10 Ω
resistor.
9. Thermal characteristics
Table 4.
Symbol
Rth(j-a)
Thermal characteristics
Parameter
thermal resistance from junction
to ambient
Conditions
in free air
Typ Unit
150 K/W
UBA3070
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 9 December 2010
© NXP B.V. 2010. All rights reserved.
6 of 16
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部品番号 | 部品説明 | メーカ |
UBA3070 | LED backlight driver IC | NXP Semiconductors |
UBA3070T | LED backlight driver IC | NXP Semiconductors |