UBA2017P/1,112 NXP Semiconductors, UBA2017P/1,112 Datasheet - Page 6

• Manufacturer Part Number: UBA2017P/1,112
• Description: Display Drivers & Controllers SMPS CTRLR 12.4V
• Manufacturer: NXP Semiconductors

Specifications of UBA2017P/1,112

• Rohs: yes
• Operating Supply Voltage: 12.4 V
• Mounting Style: Through Hole
• Package / Case: DIP-16
• Maximum Output Current: 105 mA
• Product: Fluorescent Lamp Driver
• Factory Pack Quantity: 25
• Supply Current: 2.2 mA

NXP Semiconductors
UBA2017
Product data sheet
7.2.1 VDD supply
7.2.2 Low- and high-side drivers
7.2.3 Non-overlap
The UBA2017/UBA2017A is intended to be supplied by a start-up bleeder resistor
connected between the bus voltage V
half-bridge point at pin SHHB.
The IC starts up when the voltage at pin VDD rises above start-up voltage V
locks out (stops oscillating) when the voltage at pin VDD drops below stop voltage
V
by a buffer capacitor until the dV/dt supply is settled.
The UBA2017/UBA2017A has an internal VDD clamp. This is an internal active Zener (or
shunt regulator) that limits the voltage on the VDD supply pin to clamp voltage V
No external Zener diode is needed in the dV/dt supply circuit if the maximum current of the
dV/dt supply minus the current consumption of the IC (mainly determined by the gate
drivers’ load) is below I
The low- and high-side drivers are identical. The output of each driver is connected to the
equivalent gate of an external power MOSFET. The high-side driver is supplied by the
bootstrap capacitor, which is charged from the VDD supply voltage via an internal diode
when the low-side power MOSFET is on. The low-side driver is directly supplied by the
VDD supply voltage.
During each transition between the two states GLHB HIGH/GHHB LOW and
GLHB LOW/GHHB HIGH, GLHB and GHHB are both LOW for a fixed non-overlap time
t
(assuming the load always has an inductive behavior), and enabling zero voltage
switching. See
no
stop(VDD)
to allow the half-bridge point to be charged or discharged by the load current
. The hysteresis between the start and stop levels allows the IC to be supplied
Figure
All information provided in this document is subject to legal disclaimers.
5.
clamp(VDD)
Rev. 2 — 15 May 2012
600 V fluorescent lamp driver with linear dimming function
.
BUS
and VDD and a dV/dt supply from the
UBA2017/UBA2017A
© NXP B.V. 2012. All rights reserved.
startup(VDD)
clamp(VDD)
6 of 29
and
.