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UBA3077HN の電気的特性と機能

UBA3077HNのメーカーはNXP Semiconductorsです、この部品の機能は「Three-channel switched-mode LED driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 UBA3077HN
部品説明 Three-channel switched-mode LED driver
メーカ NXP Semiconductors
ロゴ NXP Semiconductors ロゴ 




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UBA3077HN Datasheet, UBA3077HN PDF,ピン配置, 機能
UBA3077HN
Three-channel switched-mode LED driver
Rev. 1 — 8 February 2011
Objective data sheet
1. General description
The UBA3077HN is a high efficiency LED driver in an HVQFN40 package for general LED
lighting or backlighting LCD displays.
Operating from a supply of 10 V to 42 V, it can drive up to 3 strings of 20 LEDs each. The
low voltage circuitry is powered by an external 5 V voltage supply.
The chip can operate autonomously or be controlled via a 400 kHz I2C-bus.
The peak current in each string is fixed by an external resistor. Three independent
Pulse-Width Modulated (PWM) signals are available for dimming purposes. These PWM
signals are delivered either directly by the graphic processor (direct control mode) to the
pins PWM1, PWM2 and PWM3, or generated on-board based on data sent via the
I2C-bus interface.
Each LED string is supplied by its own boost converter delivering an output voltage from
VIN up to 75 V. The switching frequency is 500 kHz.
A power saving mode is entered when all PWM signals stay LOW for a period longer than
1 s.
Several protection mechanisms are available: overvoltage, short-circuit and open LED,
overcurrent, UnderVoltage LockOut (UVLO) and overtemperature with an advanced
adaptive protection. An error self-recovery (hiccup) mechanism is available with
programmable delay time via an external capacitor.
2. Features and benefits
www.DataSheet4U.com
„ Three-channel LED backlight driver
„ Up to 150 mA per channel
„ ±2 % absolute LED current accuracy „ Peak LED current programmable with
and channel-to-channel matching
external resistor
„ External power supply voltage from 10 V „ Three boost converters from VIN up to
to 42 V and 5 V for low voltage circuitry 75 V output voltage
„ Constant 500 kHz frequency peak
„ High efficiency up to 90 %
current mode control
„ Low value output capacitor (2 μF)
„ 14-bit PWM dimming (either defined by
system-generated PWMs, or internally
generated) from 2.0 kHz to 24 kHz (duty
cycle from 0.1 % to 100 %)
„ Accurate internal oscillator
„ All power FETs integrated

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UBA3077HN pdf, ピン配列
NXP Semiconductors
UBA3077HN
Three-channel switched-mode LED driver
Table 1. Quick reference data
VDD(24V) = 24 V; VDD(5V) = 5 V; VDD(IO) = 5 V; Tamb = 0° C to 80° C, unless otherwise specified.
Symbol
Parameter
Conditions
Min Typ
fsw
δmax
Vth(ovp)
switching frequency
maximum duty cycle
overvoltage protection
threshold voltage
DC-to-DC
DC-to-DC
pins VOUT1, VOUT2, VOUT3
400
-
75
500
-
77
Tamb
Tth(otp)
ambient temperature
operating
overtemperature protection die junction temperature
threshold temperature
0
-
-
150
5. Ordering information
Max Unit
600 kHz
80 %
85 V
80 °C
- °C
Table 2. Ordering information
Type number
Package
Name
Description
UBA3077HN
HVQFN40 plastic thermal enhanced very thin quad flat package; no leads;
40 terminals; body 6 × 6 × 0.85 mm
Version
SOT618-1
www.DataSheet4U.com
UBA3077HN
Objective data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 8 February 2011
© NXP B.V. 2011. All rights reserved.
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3Pages


UBA3077HN 電子部品, 半導体
NXP Semiconductors
UBA3077HN
Three-channel switched-mode LED driver
Table 3.
Symbol
PWM2
PWM3
SGND
VDD
VIN
IREF
SDA
SCL
SAD0
NC4
NC5
SAD1
FB3
PGND32
LX3
NC6
PGND31
VOUT3
NC7
NC8
PGND22
HICCUP
FB2
NC9
VOUT2
PGND21
Pin description …continued
Pin Type
Reset
state
15 input
-
16 input
-
17 supply
-
18 supply
-
19 supply
-
20 output
-
21 input/output H
22 input
H
23 input
-
24 -
-
25 -
-
26 input
-
27 power
-
28 supply
-
29 power
-
30 -
-
31 supply
-
32 power
-
33 -
-
34 -
-
35 supply
-
36 output
-
37 power
38 -
39 power
40 supply
-
-
-
-
Description
channel 2 PWM input signal
channel 3 PWM input signal
ground of low power circuitry
5 V supply voltage
power supply voltage
connection for an external precision resistor defining
the current in the LED channels
I2C-bus serial data input/output (open-drain)
I2C-bus serial clock input
I2C-bus slave address selection 0
not connected (leave unconnected)
not connected (leave unconnected)
I2C-bus slave address selection 1
channel 3 LED current source output
channel 3 LED current source ground
channel 3 boost converter switch output
not connected (leave unconnected)
channel 3 boost converter switch ground
channel 3 boost converter output voltage
not connected (leave unconnected)
not connected (leave unconnected)
channel 2 LED current source ground
connection for an external capacitor determining the
delay for automatic fault recovery
channel 2 LED current source output
not connected (leave unconnected)
channel 2 boost converter output voltage
channel 2 boost converter switch ground
8. Functional description
8.1 Supply
The UBA3077HN high voltage circuitry requires a nominal supply voltage of 24 V on pin
VIN. The allowed voltage range is 10 V to 42 V.
www.DataSheet4U.com
The UBA3077HN low voltage circuitry requires a supply voltage of 5 V on pin VDD.
Pins VDD and VIN have a built-in POR function. The POR threshold (falling edge) and
hysteresis is respectively 3.8 V and 200 mV on pins VDD and VIN.
UBA3077HN
Objective data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 8 February 2011
© NXP B.V. 2011. All rights reserved.
6 of 25

6 Page



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部品番号部品説明メーカ
UBA3077HN

Three-channel switched-mode LED driver

NXP Semiconductors
NXP Semiconductors


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