參數(shù)資料
型號(hào)： TPS68000DBTRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： FLUORESCENT LIGHT CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDSO30
封裝： GREEN, PLASTIC, TSSOP-30
文件頁(yè)數(shù)： 22/25頁(yè)
文件大小： 981K
代理商： TPS68000DBTRG4
www.ti.com
SLVS524A – OCTOBER 2005 – REVISED FEBRUARY 2006
PIN ASSIGNMENTS (continued)
Terminal Functions (continued)
TERMINAL
I/O
DESCRIPTION
NAME
NO.
PH
4
I
Phase delay programming input. A voltage between 0 V and 2 V applied to that pin programs the
phase delay of the operating frequency compared to the synchronizing frequency. Applying V5 (5.0
V) programs the device as a master regarding the main oscillator frequency (see SYNC). The
voltage applied to that pin is also used to determine the phase delay in a distributed dimming
configuration
SA
28
Source connection of switch A
SC
18
Source connection of switch C
SET
2
I
Operating frequency programming input. A resistor connected to this pin programs the internal
operating frequency.
STC
3
I
Startup capacitor. A capacitor connected to that pin determines the the time the device waits in
voltage regulation for the lamp to strike.
SYNC
1
I/O
Synchronization input or operating frequency output. If the device is configured as master (see PH)
the pin is used to provide the synchronization frequency for the slaves. Otherwise the device works
as slave and uses the applied frequency at that pin for synchronizing the operating frequency.
V5
23
I/O
Input/Output of the internal 5 V regulator for gate drive supply and control supply. A capacitor must
be connected to that pin to decouple switching noise caused by the gate drivers.
V5A
26
O
Supply input for the gate driver of the high-side switch A. A capacitor must be connected to that pin
to supply the gate driver during switching (bootstrap).
V5C
20
O
Supply input for the gate driver of the high side switch C. A capacitor must be connected to that pin
to supply the gate driver during switching (bootstrap).
VA-
10
I
Voltage amplifier negative input. This input is used to connect the compensation capacitor for
compensating the voltage loop.
VAO
9
O
Voltage amplifier output. This is the output for the voltage amplifier. It is used to connect the
compensation capacitor for the voltage loop.
VCC
24
I
Device supply voltage input. VCC must be connected to V5 in case the device is powered directly
from a regulated 5 V rail.
VREF
30
O
Voltage reference. Output of the internal 3.3 V reference for use with all the analog control inputs.
VSEN
11
I
Voltage sense. Measuring input for the lamp voltage. This voltage is used for lamp voltage
regulation (open lamp regulation) and overvoltage protection. Sensed AC voltages can be applied
directly. They are rectified internally.
6
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