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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 21/25頁 |
| 文件大?。?/td> | 981K |
| 代理商： | TPS68000DBTRG4 |
www.ti.com
PIN ASSIGNMENTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SYNC
SET
STC
PH
BBR
BC
BF
ABR
VAO
VA
VSEN
CA
CAO
CSEN
OCP
VREF
GND
SA
GA
V5A
GB
VCC
V5
PGND
GD
V5C
GC
SC
EN
FAULT
SLVS524A – OCTOBER 2005 – REVISED FEBRUARY 2006
DBT PACKAGE
(TOP VIEW)
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
ABR
8
I
Analog brightness programming input. A DC voltage applied at that pin programs the lamp current
the current regulator regulates. 0 V means no current and 3.3 V means maximum current.
BBR
5
I
Burst brightness programming input. A DC voltage applied at that pin programs the duty cycle of the
burst pulses generated to dimm the brightness. 0 V means zero duty cycle and 2 V means
maximum duty cycle. Applying V5 (5 V) programs the device to operate in synchronized burst
dimming mode.
BC
6
I
Burst control. A PWM signal applied at that pin is directly used for burst dimming. Frequency and
duty cycle are used directly. This input has priority against the burst frequency programming with
BBR and BF
BF
7
I
Burst frequency programming. A capacitor at that pin programs the burst frequency.
CA-
12
I
Current amplifier negative input. This input is used to connect the compensation capacitor for
compensating the current loop.
CAO
13
O
Current amplifier output. This is the output for the current amplifier. It is used to connect the
compensation capacitor for the current loop.
CSEN
14
I
Current sense. Measuring input for the lamp current. The applied voltage (coming from a shunt
resistor) will be used for lamp current regulation. Sensed AC voltages can be applied directly. They
will be rectified internally.
EN
17
I
Enable input. Logic high enables the device.
FAULT
16
O
Error output, any detected malfunctioning of the application will be reported as error on this pin.
Error means the output is pulled low. The output is open drain to allow connecting multiple error
outputs of similar devices together.
GA
27
O
Gate drive output of switch A
GB
25
O
Gate drive output of switch B
GC
19
O
Gate drive output of switch C
GD
21
O
Gate drive output of switch D
GND
29
Analog ground pin. Reference ground for all control signals.
OCP
15
I
Over current protection. This input is used to monitor a voltage derived from a current sensor in any
part of the converter. This voltage is compared to an internal reference voltage. Exceeding the
internal reference voltage causes the device logic to turn the device off and report an error signal at
the fault pin.
PGND
22
Reference ground for the gate drivers and the gate drive supply.
5
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