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CS1615-FSZ ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 3 Page - Cirrus Logic

๋ถ€ํ’ˆ๋ช… CS1615-FSZ
์ƒ์„ธ๋‚ด์šฉ  Single Stage Dimmable Offline AC/DC Controller for LED Lamps
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CS1615-FSZ ๋ฐ์ดํ„ฐ์‹œํŠธ(HTML) 3 Page - Cirrus Logic

 
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CS1615/16
DS961F1
3
2. PIN DESCRIPTION
Figure 2. CS1615/16 Pin Assignments
16-lead SOIC and TSSOP
16
Zero-current Detect
FBAUX
15
No Connect
NC
14
IC Supply Voltage
VDD
13
GD
Gate Drive
10
eOTP
External Overtemperature Protection
11
FBSENSE
Flyback Current Sense
12
GND
Ground
9
LED Load Current
CTRL2
No Connect
NC
1
2
IAC
Rectifier Voltage Sense
3
Voltage Clamp Current Source
CLAMP
4
SGND
Source Ground
5
Source Switch
SOURCE
6
NC
No Connect
7
No Connect
NC
8
CTRL1
Dimmer Hold Current
Pin Name
Pin #
I/O
Description
NC
1IN
No Connect โ€” Leave pin unconnected.
IAC
2IN
Rectifier Voltage Sense โ€” A current proportional to the rectified line voltage is fed
into this pin. The current is measured with an A/D converter.
CLAMP
3OUT
Voltage Clamp Current Source โ€” Connect to a voltage clamp circuit on the
source-switched dimmer-compatibility circuit.
SGND
4PWR
Source Ground โ€” Common reference current return for the SOURCE pin.
SOURCE
5IN
Source Switch โ€” Connected to the source of the source-switched external high-volt-
age FET.
NC
6IN
No Connect โ€” Connect this pin to VDD using a 47k
๏— pull-up resistor.
NC
7IN
No Connect โ€” Connect this pin to VDD using a 47k
๏—๏€ pull-up resistor.
CTRL1
8IN
Dimmer Hold Current โ€” Connect a resistor to this pin to set the minimum input cur-
rent being pulled by the flyback/buck-boost stage.
CTRL2
9IN
LED Load Current โ€” Connect a resistor to this pin to set the LED current.
eOTP
10
IN
External Overtemperature Protection โ€” Connect an external NTC thermistor to this
pin, allowing the internal A/D converter to sample the change to NTC resistance.
FBSENSE
11
IN
Feedback Current Sense โ€” The current flowing in the power FET is sensed across a
resistor. The resulting voltage is applied to this pin and digitized for use by the compu-
tational logic to determine the FET's duty cycle.
GND
12
PWR
Ground โ€” Common reference. Current return for both the input signal portion of the
IC and the gate driver.
GD
13
OUT
Gate Drive โ€” Gate drive for the power FET.
VDD
14
PWR
IC Supply Voltage โ€” Connect a storage capacitor to this pin to serve as a reservoir
for operating current for the device, including the gate drive current to the power tran-
sistor.
NC
15
-
No Connect โ€” Leave pin unconnected.
FBAUX
16
IN
Zero-current Detect โ€” Connect to the flyback/buck-boost inductor auxiliary winding
for demagnetization current zero-crossing detection.


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