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PDF AP1694A Data sheet ( Hoja de datos )
| Número de pieza | AP1694A | |
| Descripción | HIGH EFFICIENCY DIMMABLE LED DRIVER CONTROLLER | |
| Fabricantes | Diodes | |
| Logotipo |  |
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A Product Line of
Diodes Incorporated
AP1694A
Description
OFFLINE, HIGH PF, HIGH EFFICIENCY DIMMABLE LED DRIVER CONTROLLER
Features
The AP1694A is a high performance AC/DC power factor corrector for
mains dimmable LED driver applications. The device uses Pulse
Frequency Modulation (PFM) technology to regulate output current
while achieving high power factor and low THD. It operates as a BCM
(Boundary Conduction Mode) controller which is good for EMI.
The AP1694A provides accurate constant current (CC) regulation
while removing the opto-coupler and secondary control circuitry. It
also eliminates the need of loop compensation circuitry while
maintaining stability. It can meet the requirement of IEC6100-3-2
harmonic standard.
The AP1694A features low start-up current, low operation current. It
adopts valley on switching mode to achieve high efficiency. It also has
rich protection features including over voltage, short circuit, over
temperature protection.
The AP1694A provides the dimmable LED driver with a wide dimmer
compatibility including leading edge and trailing edge dimmer. The
AP1694A can achieve deep dimming down to 1%, while the dimming
curve is compliant with the standard of NEMA SSL6.
The AP1694A is available in SO-8 package.
Pin Assignments
Primary Side Control for Output Current Regulation without Opto-
coupler
Boundary Conduction Mode (BCM) Operation to Achieve High-
efficiency
High PF and Low THD (PF > 0.9, THD < 30%)
High Efficiency without Dimmer
Wide Range of Dimmer Compatibility
Dimming Curve Compliant with NEMA SSL6
Low Start-up Current
Tight LED Current
Tight LED Open Voltage
Valley-mode Switching to Minimize the Transition Loss
Mosfet driver up to 25W
Easy EMI
Internal Protections:
Under Voltage Lock Out(UVLO)
Leading-edge Blanking (LEB)
Output Short Protection
Output Open Protection
Over Temperature Protection
Flexible for Design with Small Form Factor and Very Low BOM
Cost
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
(Top View)
Mains Dimmable LED Lighting
NC 1
RI 2
SGND 3
CS 4
SO-8
8 VCC
7 OUT
6 GND
5 FB
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP1694A
Document number: DS37094 Rev. 1 - 2
1 of 15
www.diodes.com
May 2014
© Diodes Incorporated
1 page  
Recommended Operating Conditions
Symbol
VCC
TA
Parameter
Power Supply Voltage
Ambient Temperature
A Product Line of
Diodes Incorporated
AP1694A
Min Max Unit
7 25 V
-40
+105
°C
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
UVLO Section
VTH (ST)
VOPR (Min)
VCC_OVP
–
Standby Current Section
Parameter
Start-up Threshold
Minimum Operating Voltage
VCC OVP Voltage
VCC Delatch Voltage (Note 5)
IST Start-up Current
ICC (OPR)
Drive Output Section
Operating Current
VGATE
Gate Voltage
ISOURCE_L
ISOURCE_H
Low Driver Source Current
High Driver Source Current
RDS(on)
Current Sense Section
Sink Resistance
VCS_REF
Current Sense Reference
VCS_CLAMP
Current Sense Reference Clamp
tONP_MIN
Minimum tONP
tD(H-L)
Delay to Output (Note 5)
Feedback Input Section
IFB
Feedback Pin Input Leakage
Current
VFB_CV
FB CV Threshold
VFB_OVP
FB OVP Threshold
Output Current
–
System Output Current On Final
Test Board
Over Temperature Protection Section
– Shutdown Temperature (Note 5)
– Temperature Hysteresis (Note 5)
Conditions
–
After turn on
–
–
VCC = VTH (ST) -0.5V,
Before start up
Static
–
–
–
–
–
–
–
–
VFB = 2V
–
–
–
–
–
Min Typ Max Unit
13 14.5 16
5.5 6.5 7.5
27 29 31
345
V
V
V
V
– – 20 µA
–
900 1300
µA
11 12 14
V
35 40 45 mA
90 100 120 mA
678 Ω
–1–
1.2 1.4
–
700 – 1000
50 150 250
V
V
ns
ns
– – 4 µA
3.8 4 4.2 V
4.5 6 7.5 V
– – ±2 %
+150
–
–
+20
–
–
°C
°C
Note 5: These parameters, although guaranteed by design, are not 100% tested in production.
AP1694A
Document number: DS37094 Rev. 1 - 2
5 of 15
www.diodes.com
May 2014
© Diodes Incorporated
5 Page 
A Product Line of
Diodes Incorporated
Application Information Based on Buck Structure (Cont.)
Fault Protection
Over Voltage Protection and Output Open Protection
AP1694A
VCC
RFB1
RFB2
FB
AP1694A
Figure 4. OVP Circuit
The output voltage is sensed by the auxiliary winding voltage of the Buck transformer, the VCC pin and FB pin provide over voltage protection
function. When the output is open or large transient happens, the output voltage will exceed the rated value. When the voltage of Vcc cap exceeds
VCC_OVP or VFB_CV, the over voltage is triggered and the IC will discharge VCC. When the VCC is below the UVLO threshold voltage, IC will start a
new work cycle and the Vcc cap is charged again by start resistance. If the over voltage condition still exists, the system will work in hiccup mode.
Attention: If the external fast startup circuit is adding in the application and the over voltage protection and output open protection happen, the IC
will trigger latch.
Output Short Protection
When the output is shorted, the output voltage will be clamped at 0. At this condition, VCC will drop down without auxiliary winding for power supply.
And the VCC will drop to UVLO threshold voltage, the IC will shut down and restart a new operating cycle, and the VCC is charged by startup
resistance. When VCC is higher than Vcc_start voltage, IC will output a bunch of pulse to control power switch on and off. When still no FB signal
detected the device will not output more pulse. So the VCC will drop to VCC UVLO threshold again. If output short condition still exists, the system
will operate in hiccup mode.
Attention: If the external fast startup circuit is adding in the application, the device will not work at UVLO mode, and the device will work at
minimum toff mode.
Over Temperature Protection
AP1694A has two kinds of over temperature protection processes. First, the system is operating normally, the ambient temperature is changed to
+170°C suddenly, the IC will trigger over temperature protection which leads to a latch work mode. Second, if the system starts when the ambient
temperature is higher than +150°C, over temperature protection will be triggered. So the AP1694A can startup successfully when the ambient
temperature is less than +150°C.
Components Selection Guide
If the system’s spec is changed, please refer to the design sheet of the AP1694A and select the compatible system parameter. When the system
needs to be adjusted slightly, please refer to the table below and adjust the value of the related component.
Item
IO
Output Current Ripple
ton_initial
Output Open Voltage
Dimming Performance
EMI
Line Compensation
Description
Output current
Small current ripple is good for LED life
System initial on time, used to startup the system
Setting the output voltage when the LED is open
Improve the dimming performance
Pass EN 55022 class B with 6DB margin
To get a good line regulation
Related Components
R8
C4
R1
R5, R6
R1, RF, R9, C2, C4
L1, C1
R7
AP1694A
Document number: DS37094 Rev. 1 - 2
11 of 15
www.diodes.com
May 2014
© Diodes Incorporated
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AP1694A.PDF ] | |
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