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參數資料
| 型號： | TPS65530RSLRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3.3 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
| 封裝： | 6 X 6 MM, 0.40 MM PITCH, GREEN, PLASTIC, QFN-48 |
| 文件頁數： | 11/31頁 |
| 文件大?。?/td> | 931K |
| 代理商： | TPS65530RSLRG4 |
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CH7 Description
LED
BADJ
SENSE
0.2
0.05
I
=
V
+
R
(7)
www.ti.com....................................................................................................................................................... SLVS744C – OCTOBER 2007 – REVISED MAY 2008
Table 16. Recommended Parts for Capacitor (Output, CH6)
VENDOR
TYPE NO.
CAPACITANCE (
F)
TOLERANCE (%)
SIZE (mm)
Murata
GRM31CB31E106KA75
10.0
10
3.2
× 1.6 × 1.6 (EIA code: 1206)
Table 17. Recommended Parts for Diode (CH6)
VENDOR
TYPE NO.
VR (V)
IF (mA)
VF (V)/IF (A)
CAPACITANCE (pF)
SIZE (mm)
Sanyo
SB0503EJ
30
500
0.55/0.5
16.5
1.6
× 0.8 × 0.6
CH7 is the voltage-mode-controlled nonsynchronous boost converter for the backlight LED. The switch between
the inductor and power GND is integrated into the device and consists of NMOS-FET. Also, this device has a
load switch to control the output current and consists of NMOS-FET. The output current is constant and is
calculated by Equation 7. It is controlled by the B_ADJ (pin 32) input voltage as shown in Figure 8. The B_ADJ
input voltage is required as an analog input. When it is required to input PWM signal for B_ADJ, the RC filter is
needed.
Where:
ILED = Output current of CH7 [A]
RSENSE = Sense resistor between FBC and PGND5/7 []
VBADJ = B_ADJ input voltage (0 < VBADJ < 1) [V]
Figure 8. Output Current vs B_ADJ Input Voltage (RSENSE = 10
)
The principle of the operation is to adjust the duty cycle of the MOSFET. When the B_ADJ input voltage is
changed, the level of “A” point shown in Figure 9 is changed to get the desired duty cycle compared to the sense
current.
Copyright 2007–2008, Texas Instruments Incorporated
19
Product Folder Link(s): TPS65530
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| TPS65552ADGQR | 功能描述:其他電源管理 Intgrtd Photo Flash Charger & IGBT Drv RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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