Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

CS1616 Datenblatt(PDF) 11 Page - Cirrus Logic

Teilenummer CS1616
Bauteilbeschribung  Single Stage Dimmable Offline AC/DC Controller for LED Lamps
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  APEX [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo APEX - Cirrus Logic

CS1616 Datenblatt(HTML) 11 Page - Cirrus Logic

Back Button CS1616 Datasheet HTML 7Page - Cirrus Logic CS1616 Datasheet HTML 8Page - Cirrus Logic CS1616 Datasheet HTML 9Page - Cirrus Logic CS1616 Datasheet HTML 10Page - Cirrus Logic CS1616 Datasheet HTML 11Page - Cirrus Logic CS1616 Datasheet HTML 12Page - Cirrus Logic CS1616 Datasheet HTML 13Page - Cirrus Logic CS1616 Datasheet HTML 14Page - Cirrus Logic CS1616 Datasheet HTML 15Page - Cirrus Logic Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 16 page
background image
CS1615/16
DS961F1
11
5.6.7 Overcurrent Protection
Overcurrent protection (OCP) is implemented by monitoring the
voltage across the sense resistor. If this voltage exceeds a
threshold VOCP(th) of 1.69V, a fault condition occurs. The IC
output is disabled and the controller attempts to restart after
approximately one second.
5.6.8 Open Loop Protection
Open loop protection (OLP) and sense resistor short protection
are implemented by monitoring the voltage across the resistor. If
the voltage on pin FBSENSE does not reach the protection
threshold VOLP(th) of 200mV, the IC output is disabled, and the
controller attempts to restart after approximately one second.
5.7 Overtemperature Protection
The
CS1615/16
incorporates
internal
overtemperature
protection (iOTP) and the ability to connect an external
overtemperature sense circuit for IC protection. Typically, an
NTC thermistor is used.
5.7.1 Internal Overtemperature Protection
Internal overtemperature protection (iOTP) is activated, and
switching is disabled when the die temperature of the devices
exceeds 135°C. There is a hysteresis of about 14°C before
resuming normal operation.
5.7.2 External Overtemperature Protection
The external overtemperature protection (eOTP) pin is used to
implement overtemperature protection. A negative temperature
coefficient (NTC) thermistor resistive network is connected to pin
eOTP, usually in the form of a series combination of a resistor RS
and a thermistor RNTC (see Figure 15). The CS1615/16 cyclically
samples the resistance connected to pin eOTP.
The total resistance on the eOTP pin gives an indication of the
temperature and is used in a digital feedback loop to adjust
current ICONNECT into the NTC and series resistor RS to maintain
a constant reference voltage VCONNECT(th) of 1.25V. Current
ICONNECT is generated from a controlled current source with a
full-scale current of 80
A. When the loop is in equilibrium, the
voltage on the eOTP pin fluctuates around reference
voltage VCONNECT(th). A resistance ADC is used to generate
current ICONNECT. The ADC output is filtered to suppress noise
and compared against a reference that corresponds to 125°C. A
second low-pass filter with a time constant of two seconds filters
the ADC output and is used to scale down the internal dim level
of the system (and hence LED current ILED) if the temperature
exceeds 95°C. The large time constant for this filter ensures that
the dim scaling does not happen spontaneously and is not
noticeable (suppress spurious glitches). The eOTP tracking
circuit is designed to function accurately with external
capacitance up to 470pF.
The tracking range of this resistance ADC is approximately
15.5k
 to 4M. The series resistor RS is used to adjust the
resistance of the NTC to fall within the ADC tracking range,
allowing the entire dynamic range of the ADC to be well used.
The CS1615/16 recognizes a resistance (RS+RNTC) equal to
20.3k
 which corresponds to a temperature of 95°C, as the
beginning of an overtemperature dimming event and starts
reducing the power dissipation. The output current is scaled until
the series resistance (RS+RNTC) value reaches 16.6k (125°C).
Beyond this temperature, the IC shuts down until the resistance
(RS+RNTC) rises above 19.23k. This is not a latched protection
state, and the ADC keeps tracking the temperature in this state
in order to clear the fault state once the temperature drops below
110°C.
When exiting reset, the chip enters startup and the ADC quickly
(<5ms) tracks the external temperature to check if it is below the
110°C reference code before the controller is powered up. If this
check fails, the chip will wait until this condition becomes true
before initializing the rest of the system.
For example, a 14k
 (±1% tolerance) series resistor is required
to allow measurements of up to 130°C to be within the eOTP
tracking range when a 100k
 NTC with a Beta of 4275. If the
temperature exceeds 95°C, thermistor RNTC is approximately
6.3k
 and series resistor RS is 14k, so the eOTP pin has a total
resistance of 20.3k
. The eOTP pin initiates protective dimming
action by reducing the power dissipation. At 125°C the thermistor
RNTC has 2.6k plus a series resistor RS equal to 14k present
a resistance of 16.6k
 at the eOTP pin reaching the point where
a thermal shutdown fault intervenes. The CS1615/16 will
continue to monitor pin eOTP and once the series resistor RS
plus the thermistor RNTC rises above 19.23k the device will
resume power conversion (see Figure 16).
If the external overtemperature protection feature is not required,
connect the eOTP pin to GND using a 50k
-to-500k resistor to
disable the eOTP feature.
CS1615/16
+
-
I
CONNE CT
V
CONNE CT
(th)
Comp_Out
eOTP
Control
eOTP
RS
CNTC
NTC
V
DD
10
(Optional )
Figure 15. eOTP Functional Diagram
Temperature (°C)
125
95
50%
100%
0
25
Figure 16. eOTP Temperature vs. Impedance


Ähnliche Teilenummer - CS1616

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Cirrus Logic
CS1616 CIRRUS-CS1616 Datasheet
387Kb / 16P
   Single Stage Dimmable Offline AC/DCController for LED Lamps
logo
Hammond Manufacturing L...
CS16166 HAMMOND-CS16166 Datasheet
115Kb / 3P
   Type 1 Mild Steel Junction Box CS Series Screw Cover and without Knockouts
CS16168 HAMMOND-CS16168 Datasheet
115Kb / 3P
   Type 1 Mild Steel Junction Box CS Series Screw Cover and without Knockouts
More results

Ähnliche Beschreibung - CS1616

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Cirrus Logic
CS1615 CIRRUS-CS1615 Datasheet
387Kb / 16P
   Single Stage Dimmable Offline AC/DCController for LED Lamps
logo
Maxim Integrated Produc...
MAX16841 MAXIM-MAX16841 Datasheet
1Mb / 18P
   Controller IC for Dimmable Offline LED Lamps
Rev 0; 10/11
MAX16841 MAXIM-MAX16841_13 Datasheet
1Mb / 18P
   Controller IC for Dimmable Offline LED Lamps
Rev 1; 6/13
logo
Dialog Semiconductor
IW3688 DIALOG-IW3688 Datasheet
384Kb / 6P
   AC/DC Advanced Digital Power Controller for Single-Stage Dimmable LED Drivers
logo
Diodes Incorporated
AL1663 DIODES-AL1663 Datasheet
436Kb / 15P
   SINGLE STAGE DIMMABLE LED CONTROLLER
logo
Dialog Semiconductor
IW3600 DIALOG-IW3600 Datasheet
317Kb / 5P
   AC/DC Digital Power Controller for Single-Stage High Power Factor Dimmable LED Drivers
logo
Cypress Semiconductor
CY8CLEDAC02 CYPRESS-CY8CLEDAC02 Datasheet
1Mb / 20P
   AC-DC Controller for Dimmable LED Lighting
logo
Dialog Semiconductor
IW3689 DIALOG-IW3689 Datasheet
287Kb / 6P
   AC/DC Digital Power Controller for Single-Stage High Power Factor Dimmable LED Drivers
logo
Bright Power Semiconduc...
BP3309 BPS-BP3309 Datasheet
378Kb / 8P
   PSR Single-Stage APFC Offline LED Controller
Rev 1.2
logo
Unisonic Technologies
UCL2310 UTC-UCL2310 Datasheet
197Kb / 7P
   PSR SINGLE-STAGE APFC OFFLINE LED CONTROLLER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com