LED7708 STMicroelectronics, LED7708 Datasheet - Page 9

• Manufacturer Part Number: LED7708
• Description: LED Lighting Drivers 16 Ch 85mA LED 3.6 to 36V 250kHz
• Manufacturer: STMicroelectronics

Specifications of LED7708

• Rohs: yes

LED7708
Table 2.
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin
AGND
PGND
CSNS
GATE
LREN
LDO3
CH14
CH15
CH16
VMIN
VDR
VFB
VIN
Pin description (continued)
Driver output (channel) #14.
Driver output (channel) #15.
Driver output (channel) #16.
Analog ground. Common return for the current generators (channels).
Minimum output voltage setting. Multi-level input (high, low, floating or resistor to SGND).
Used in conjunction with the VFB pin to set the best output voltage range swing for a given
LED array. See related section for further details.
External MOSFET current sense input. Connect to the sensing resistor in series with the
power switch (source of the power MOSFET node).
Power ground. Reference for the external MOSFET current sensing circuit and return for
the gate driver.
External MOSFET gate driver output. Connected to the gate of the power MOSFET.
Gate driver supply. Internally connected to the 5 V LDO regulator. Bypass with a 1 µF
ceramic capacitor to PGND as close as possible to the chip.
3.3 V linear regulator enable. When high or floating, the internal 3.3 V linear regulator is
used to supply the device. Also used to turn off the device for power consumption
reduction. To be left floating the internal 3.3 V LDO is overdriven by an external 3.3 V
supply rail.
Input of the LDO linear regulators. Bypass with a 1µF ceramic capacitor to ground as close
as possible to the chip.
3.3 V device supply and internal 3.3 V linear regulator output. Bypass with a 1 µF ceramic
capacitor to ground as close as possible to the chip.
Output voltage feedback for the boost controller. Connect to the central tap of the output
resistor divider. See the related section for details.
Doc ID 022698 Rev 1
Function
Pin function
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