ISL1902FAZ-T7A Intersil, ISL1902FAZ-T7A Datasheet - Page 4

• Manufacturer Part Number: ISL1902FAZ-T7A
• Description: LED Lighting Drivers Dimmable AC Mains LED Driver PFC
• Manufacturer: Intersil

Specifications of ISL1902FAZ-T7A

• Rohs: yes
• Input Voltage: 4 V
• Operating Frequency: 320 Hz
• Maximum Supply Current: 14.5 mA
• Output Current: 1 A
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: QSOP-24
• Minimum Operating Temperature: - 40 C

Functional Block Diagram - ISL1902
PRELOAD
OFFREF
DELADJ
LPOUT
REFIN
RAMP
VREF
IOUT
GND
VDD
CS+
CS-
AC
OC
DIFFERENTIAL ISENSE
Oscillator
Master
LOW PASS FILTER
DUTY CYCLE TO
-
+
CONVERTER
DETECTION
Detector
VOLTAGE
Peak
AC
CLK
Blanking
REF
Leading
Edge
200mV
BG
-
+
IOUT
DETECTOR
-
+
600 mV
AC-PRESENT
CrCM
UVLO
OTP Shutdown
-
+
150 - 170 °C
+
-
Verr/5
EA1
EA2
Quasi-ZVS
PRIMARY OC
Clamp
VERR
Delay
f
1/5
MAX
SS/5
+
-
+
-
-
1/5
+
COMPARATOR
-
CLK
FB2
No AC Counter
Clamp
PWM
BIAS/UVLO/OTP
Reference
Generator
f
Bias and
MIN
FB1
CARRY
CrCM OSCILLATOR/PWM/ERROR
MINIMUM DIMMING
LEVEL CONTROL
INHIBIT
AMPLIFIERS
-
+
PWM LATCH
S
R
Q
Q
INRUSH CONTROL CIRCUIT
DELAYED AC-P
PWM
SS
REFINBUFF
VERR
CLK
One Shot
Triangle Wave
150us
Q
Q
Generator
Reference SS
+
+
_
Buffer
DIMMING PWM
REFINBUFF
AC Present 0-Xing
One Shot
Blanking
350 μS
Q
Q
-
+
VERR CLAMP
INHIBIT
SOFT-START/POR/OVP
Reference SS
LINEAR AMPLIFIER
VREF
+
-
-
+
ENABLE
SS LOW
SS
FAULT LATCH
S
R
Soft Start
Q
Q
+
300 ms
-
+
- 1.50 V
0.25 V
INRUSH
LREF
LOUT
LFB
PWMOUT
OUT
OVP