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LED7707TR Datasheet(PDF) 11 Page - STMicroelectronics |
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LED7707TR Datasheet(HTML) 11 Page - STMicroelectronics |
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11 / 48 page  LED7707 Operation description 11/48 5 Operation description The device can be divided into two sections: the boost section and the backlight driver section. These sections are described in the next paragraphs. Figure 3 provides an overview of the internal blocks of the device. Figure 3. Simplified block diagram LDO5 BILIM COMP SYNC FSW RILIM EN FAULT ROW4 PGND LX ROW6 DIM VIN ROW1 SLOPE AVCC ROW3 CONTROL LOGIC ROW2 + _ Thermal Shutdown ROW5 OVSEL + _ SGND Ext Sync Detector OSC OVP Boost_EN 1.2V 4V MODE Boost_EN 0.7V Min Voltage Selector UVLO UVLO Detector +5V LDO Ramp Generator Current Sense 1.172V Soft Start OVP CTRL1 CTRL6 VROW1 VROW2 VROW5 VROW4 VROW3 VROW6 CTRL2 VTH,FLT CTRL5 CTRL3 CTRL4 CTRL2 UVLO CTRL3 CTRL4 CTRL5 CTRL6 Current Generator 2 Current Generator 3 Current Generator 4 Current Generator 5 Current Generator 6 Current Generator 1 Current Limit LOGIC Boost Control Logic ZCD gm I to V I to V SS MODE ÷2 Prot_EN Prot_EN AM00580v1 |
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