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PDF ISL1904 Data sheet ( Hoja de datos )
| Número de pieza | ISL1904 | |
| Descripción | Dimmable AC Mains LED Driver | |
| Fabricantes | Intersil | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ISL1904 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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Dimmable AC Mains LED Driver with PFC and Primary
Side Regulation
ISL1904
The ISL1904 is a high-performance, critical conduction mode
(CrCM), flyback controller used for single-stage conversion of
the AC mains to a constant current source with power factor
correction (PFC). The controller regulates the output current by
monitoring the primary side switching current so the feedback
signal does not cross the isolation barrier. Operation in CrCM
allows near zero-voltage quasi-resonant switching (ZVS) for
improved efficiency while maximizing magnetic core
utilization. The ISL1904 LED driver provides all of the features
required for high-performance dimmable LED ballast designs
and supports AC or DC input, isolated or non-isolated flyback
and boost topologies. This advanced BiCMOS controller
features all of the functions required to design low cost low
parts count LED driver.
Features
• Excellent LED Current Regulation over Line, Load, and
Temperature
• 0 - 100% Dimming with Leading-Edge (Triac) and
Trailing-Edge Dimmers
• Power Factor Correction for up to 0.995 Power Factor and
less than 20% Harmonic Content
• Critical Conduction Mode (CrCM) Operation for
Quasi-Resonant High Efficiency Performance
• Supports Universal AC Mains Input
• Configurable for PWM or DC Current Dimming Control of
LEDs
• Monitors FET Switching Current for Load Regulation
• Supports Isolated and Non-Isolated Boost and Flyback
Topologies
• Closed Loop Soft-Start for No Overshoot
• OFFREF Feature to Set Dimming Off-Point to Improve Fixture
Performance Matching
• -40°C to +125°C Operation
• Pb-free (RoHS Compliant)
Applicationswww.DataSheet.net/
• Industrial and Commercial LED LIghting
• Retrofit LED Lamps with Triac Dimming
• Universal AC Mains Input LED Retrofit Lamps
• AC or DC Input LED Ballasts
EMI Filter
AC Mains
850
1
VDD
14 DHC
5
CS+
800
750
12 AC
OUT 16
ISL1904
8 DELADJ
OC 6
13 GND
VERR 9
700 4LEDs
5LEDs
650
6LEDs
3 VREF
RAMP
10
FB 7
IOUT
4
600
550
180 190 200 210 220 230 240 250 260 270
FIGURE 1A. TYPICAL APPLICATION
LINE VOLTAGE (VRMS)
FIGURE 1B. LED CURRENT vs LINE VOLTAGE
FIGURE 1. TYPICAL APPLICATION PERFORMANCE
August 10, 2012
FN8286.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
Typical Application - Dimmable DC Input Boost Converter
9V TO 26V
1 VDD
OUT 16
2 OFFREF PWMOUT 15
3 VREF
DHC 14
4 IOUT
GND 13
ISL1904
5 CS+
AC 12
6 OC
OVP 11
7 FB
RAMP 10
8 DELADJ VERR 9
PWM DIMMING INPUT
90HZ TO 140HZ, 0V TO 4V
0 TO 100% DUTY CYCLE
5 Page 
ISL1904
Electrical Specifications Recommended operating conditions unless otherwise noted. Refer to “Functional Block Diagram -
ISL1904” on page 2 and “Typical Application schematics” beginning on page 3. VDD = 17V, RRAMP = 54kΩ, CRAMP = 470pF, TA = -40°C to
+125°C, Typical values are at TA = +25°C; Boldface limits apply over the operating temperature range, -40°C to +125°C. (Continued)
PARAMETER
TEST CONDITIONS
MIN MAX
(Note 7)
TYP
(Note 7)
UNITS
EA Reference vs AC Conduction Angle
ILPOUT = 0µA, f = 120Hz (rectified),
8V < VDD< 26V
Duty Cycle (α) = 98%
523 548 574
mV
Duty Cycle (α) = 75%
286 318 340 mV
Duty Cycle (α) = 50%
117 139 156 mV
Duty Cycle (α) = 25%
16 32 44 mV
Duty Cycle (α) = 10%
0 3 11 mV
DHC
Low Level Output Voltage (VOL)
VDHC = 10mA,
VDD = 8V operating
- - 600 mV
Turn-off Delay after AC Returns
- 4.0 - µs
SOFT-START
Duration
289 389 483 ms
Reference Soft-Start Initial Step
11 27 43 mV
OFFREF
Input Bias Current
-1.0 - 1.0 µA
Operating Range (Excluding Offset)
0 - 0.5 V
Threshold Hysteresis
33 52 70 mV
Threshold Offset
www.DataSheet.net/
78 104 129 mV
AC Dropout Disable Delay
- 32 - ms
OUT
High Level Output Voltage (VOH)
VOUT @ 0mA - VOUT @ -100mA,
-
0.35
1.2
V
VDD = 8V operating, RAMP = 0V
Low Level Output Voltage (VOL)
Rise Time
Fall Time
Output Clamp Voltage
Unbiased Output Voltage Clamp
PWMOUT
VOUT @ 100mA, VDD = 8V operating
CLOAD = 2.2nF, VDD = 8V,
t90% - t10%
CLOAD = 2.2nF, VDD = 8V,
t10% - t90%
VDD = 20V, ILOAD = -10µA
VDD = 6V, ILOAD = 5mA
-
-
-
10.5
-
0.7
35
25
12.0
-
1.2
55
40
13.4
1.9
V
ns
ns
V
V
High Level Output Voltage (VOH)
VOUT @ 0mA - VOUT @ -10mA,
VDD = 8V operating
- 0.8 1.2 V
Low Level Output Voltage (VOL)
VOUT @ 10mA,
VDD = 8V operating
- 0.8 1.2 V
Rise Time
Fall Time
Output Voltage Clamp
CLOAD = 1nF, VDD = 8V operating,
t90% - t10%
CLOAD = 1nF, VDD = 8V operating,
t10% - t90%
VDD = 20V, ILOAD = -10µA
-
-
10.5
160
160
12.0
240
240
13.4
ns
ns
V
11
FN8286.0
August 10, 2012
Datasheet pdf - http://www.DataSheet4U.co.kr/
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet ISL1904.PDF ] | |
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