L6699D STMicroelectronics, L6699D Datasheet - Page 31

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L6699D

Manufacturer Part Number
L6699D
Description
AC/DC Switching Converters Enhanced High Volt Res CTRL 600V
Manufacturer
STMicroelectronics
Type
High Voltage Controllersr
Datasheet

Specifications of L6699D

Product Category
AC/DC Switching Converters
Output Voltage
13.3 V
Input / Supply Voltage (max)
8.85 V
Input / Supply Voltage (min)
16 V
Switching Frequency
235 kHz
Supply Current
3 mA
Operating Temperature Range
- 25 C to + 125 C
Mounting Style
SMD/SMT
Package / Case
SO-16
Number Of Outputs
1
Output Current
800 mA

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L6699
Line sensing function
Figure 22. Line sensing function: internal block diagram and timing diagram
While the line undervoltage is active there is no switching activity, therefore the V
voltage
CC
(if not supplied by another source) continuously oscillates between the startup and the
UVLO thresholds, as shown in the timing diagram of
Figure 22
.
The LINE pin, while the device is operating, is a high impedance input connected to high
value resistors, so it is prone to pick-up noise,. This might alter Vin
or give rise to
OFF
undesired switch-off of the IC during ESD tests. It is possible to bypass the pin to ground
with a small film capacitor (e.g. 1-10 nF) to prevent any malfunctioning of this kind.
If the function is not used the pin can be pulled high by connecting it to V
through a
CC
Ω
resistor in the hundred k
.
Doc ID 022835 Rev 2
31/38

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