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UBA20260 の電気的特性と機能

UBA20260のメーカーはNXP Semiconductorsです、この部品の機能は「600V driver IC」です。


製品の詳細 ( Datasheet PDF )

部品番号 UBA20260
部品説明 600V driver IC
メーカ NXP Semiconductors
ロゴ NXP Semiconductors ロゴ 




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UBA20260 Datasheet, UBA20260 PDF,ピン配置, 機能
UBA20260
600 V driver IC for step dimmable CFLs
Rev. 2 — 10 October 2011
Product data sheet
1. General description
The UBA20260 is a high-voltage integrated circuit designed to control high power
self-ballasted Compact Fluorescent Lamp (CFL) lighting applications. The UBA20260 is a
controller circuit with advanced features for step dimming and a lamp current controlled
boost feature for boosting cold (amalgam) CFLs.
The controller contains a half-bridge drive function for CFLs, a high-voltage level-shift
circuit with integrated bootstrap diode, an oscillator function, a current control function for
preheat and burn, a timer function and protection circuits. The UBA20260 is supplied
using the dV/dt current charge supply circuit from the half-bridge circuit.
Remark: The mains voltages given in this data sheet are AC voltages.
2. Features and benefits
2.1 Half-bridge features
Integrated high-voltage level-shift function with integrated bootstrap diode
2.2 Preheat and ignition features
Coil saturation protection during ignition
Adjustable preheat time
Adjustable preheat current
Ignition lamp current detection
2.3 Lamp boost features
Adjustable boost timing
Fixed boost current ratio of 1.5
Gradually boost to burn transition timing

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UBA20260 pdf, ピン配列
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VDD
4
SUPPLY
REFERENCE
VOLTAGES
5 V DIGITAL MEMORY
5 V DIGITAL
5 V ANALOG
+ VDD(stop)
-
RESET
CP 11
PREHEAT/
BOOST TIMER
CB 12
5V
+
-
STEP
DIMMER
LOGIC
+
-
1 μA
6 μA
60 μA
SGND 13
REFERENCE
CURRENT
1.27 V
+-
25 μA
VOLTAGE
CONTROLLED OSCILLATOR
+
-
I
V
BOOTSTRAP
TEMPERATURE
SENSOR
160° 120° 80°
DIVIDE BY 2
LOGIC
STATE LOGIC
DRIVER
LOGIC
RESET STATE
START-UP STATE
PREHEAT STATE
IGNITION STATE
HOLD STATE
BOOST STATE
BURN STATE
POWER-DOWN STATE
LOGIC
FREQUENCY
CONTROL
4
BOOST
AMPLIFIER
OTA
+
-
LAMP
CURRENT
SENSOR
DSR
LEVEL
SHIFTER
HS driver
LS driver
CAPACITIVE MODE DETECTOR
+
-
Vth(capm)SLS
PREHEAT CURRENT SENSOR
+
-
Vph(SLS)
INDUCTOR SATURATION/
OVERCURRENT DETECTOR
+
-
25 μA
Vth(ocp)SLS
IGNITION CURRENT DETECTOR
-
2 + Vth(det)ign(CSI)
QA QB
STEP DIM LEVEL SELECT
VMDL
VDIM_3
VDIM_2
VDIM_1
Vclamp(CSI)
14 FS
16 GHS
15 HBO
2 GLS
1 SLS
3 PGND
10 n.c.
5
RREF
Fig 1. Block diagram
6
CF
89
CI CSI
7
MDL
001aam761


3Pages


UBA20260 電子部品, 半導体
NXP Semiconductors
UBA20260
600 V driver IC for step dimmable CFLs
7.2 Lamp start-up cycle
7.2.1 Reset state
The UBA20260 is in the reset state when the supply voltage on the VDD pin is below the
VDD(rst) level. In the reset state, part of the internal supply is turned off and all registers,
counters and timers are undefined. The hold state latch is reset and both the external high
and low side power transistors (Q1/Q2) are non-conductive.
During power-up, the low voltage supply capacitor on the VDD pin is charged through the
external start-up resistor. The start-up state is entered when the voltage on the VDD pin is
above the VDD(rst) level. The UBA20260 enters the reset state when the supply voltage on
the VDD pin drops below VDD(rst).
7.2.2 Start-up state
The start-up state is entered by charging the low voltage supply capacitor on the VDD pin
through the external start-up resistor. At start-up, the High-Side (HS) transistor is
non-conductive and the Low-Side (LS) transistor is conductive to enable charging of the
bootstrap capacitor. This capacitor supplies the HS driver and Level shifter circuit
connected between the FS and HBO pin. A DC reset circuit is integrated into the HS
driver. This circuit ensures that below the FS pin lockout voltage, the output voltage
VGHS VHBO is zero.
When the start-up state is entered, the circuit only starts oscillating at fbridge(max) when the
low voltage supply (VDD) reaches the VDD(start) value. The circuit always starts oscillating
at fbridge(max). The circuit enters the preheat state as soon as the capacitor connected to
the CP pin is charged above the Vth(CP)max voltage level. To keep oscillating, VDD must be
above VDD(stop) and below the VDD(clamp) upper limit.
During the start-up state, the voltage on the CF pin is zero and on the CB pin is close to
zero. The voltage on the CP pin rises just above Vth(CP)max during the start-up state as
shown in Figure 9.
7.2.3 Preheat state
After starting at fbridge(max), the frequency decreases by charging capacitor CCI using an
output current circuit. The preheat current sensor circuit controls the current output circuit,
until the momentary value of the voltage across sense resistor RSLS reaches the fixed
preheat voltage level (SLS pin). At this level, the current of the preheat current sensor
reaches the charge and discharge balanced state on capacitor CCI to set the half-bridge
frequency.
The preheat time consists of eight saw-tooth pulses at the CP pin. The preheat time
begins as soon as the capacitor on the CP pin is charged above Vth(CP)max value. During
the preheat time, the current feedback sensor circuit (input CSI pin) is disabled.
To increase noise immunity, an internal filter of 30 ns is included at the SLS pin.
If the level on the VDD pin drops below VDD(stop) during preheat, the preheat state is
immediately stopped and the circuit enters the hold state. The hold state delays a new
preheat cycle by a fixed delay time. A fixed voltage drop on the preheat capacitor CCP and
the fixed discharge current on the CP pin are used to set the delay time.
UBA20260
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 10 October 2011
© NXP B.V. 2011. All rights reserved.
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