參數(shù)資料
型號: TPS65530ARSLR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 0.6 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PQCC48
封裝: 6 X 6 MM, 0.40 MM PITCH, GREEN, PLASTIC, VQFN-48
文件頁數(shù): 14/32頁
文件大小: 923K
代理商: TPS65530ARSLR
www.ti.com............................................................................................................................................................ SLVS835C – APRIL 2008 – REVISED APRIL 2009
Figure 9. LED Brightness Control Block Diagram
At first, CH7 operates as pulse frequency modulation (PFM) mode at start-up. After reaching the target output
voltage, CH7 operation is changed from PFM mode to pulse width modulation (PWM) mode automatically. The
output voltage is programmable up to 20 V to use the feedback loop sensed by the external resistances. The
maximum output voltage is calculated by Equation 8. The block diagram is shown in Figure 10.
VOUT7 MAX = 1 + (R2/R1) × 1.25 [V]
(8)
Where:
VOUT7 MAX = Maximum output voltage of CH7 [V]
R1, R2 = Feedback resistance (see Figure 10)
Copyright 2008–2009, Texas Instruments Incorporated
21
Product Folder Link(s): TPS65530A
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