PWM Controller. ISL6841 Datasheet

ISL6841 Controller. Datasheet pdf. Equivalent


Renesas ISL6841
Datasheet
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844
Improved Industry Standard Single-Ended Current Mode PWM Controller
The ISL6840, ISL6841, ISL6842, ISL6843, and
ISL6844 (ISL684x) family of adjustable frequency, low
power, Pulse-Width Modulating (PWM) current mode
controllers is designed for a wide range of power
conversion applications including boost, flyback, and
isolated output configurations. Peak current mode
control effectively handles power transients and
provides inherent overcurrent protection.
This advanced BiCMOS design is pin-compatible with
the industry standard 384x family of controllers and
offers significantly improved performance. Features
include low operating current, 60µA start-up current,
adjustable operating frequency to 2MHz, and high
peak current drive capability with 20ns rise and fall
times.
Part Number
ISL6840
ISL6841
ISL6842
ISL6843
ISL6844
Rising UVLO (V)
7.0
7.0
14.4
8.4
14.4
MAX. Duty Cycle (%)
100
50
100
100
50
Related Literature
For a full list of related documents, visit our website:
ISL6840, ISL6841, ISL6842, ISL6843, ISL6844
device pages
Features
• 1A MOSFET gate driver
• 60µA start-up current, 100µA maximum
• 25ns propagation delay current sense to output
• Fast transient response with peak current mode
control
• Adjustable switching frequency to 2MHz
• 20ns rise and fall times with 1nF output load
• Trimmed timing capacitor discharge current for
accurate deadtime/maximum duty cycle control
• High bandwidth error amplifier
• Tight tolerance voltage reference over line, load,
and temperature
• Tight tolerance current limit threshold
• Pb-free available (RoHS compliant)
Applications
• Telecom and datacom power
• Wireless base station power
• File server power
• Industrial power systems
• PC power supplies
• Isolated buck and flyback regulators
• Boost regulators
FN9124 Rev.14.00
Jul.22.19
Page 1 of 17


ISL6841 Datasheet
Recommendation ISL6841 Datasheet
Part ISL6841
Description Improved Industry Standard Single-Ended Current Mode PWM Controller
Feature ISL6841; Datasheet ISL6840, ISL6841, ISL6842, ISL6843, ISL6844 Improved Industry Standard Single-Ended Curre.
Manufacture Renesas
Datasheet
Download ISL6841 Datasheet




Renesas ISL6841
1. Overview
1.1 Typical Applications
VIN+
36V to 75V
C1
VIN-
R1
R6
Q3
VR1
R3
C2
C3
C4
CR6
Q1
R4
CR1
CR5
T1
C21 + C15
R21
C5 CR2
CR4 +
C22
C17 C19
+
C20
C6 R16 R17
U2 R19
C14
+3.3V
+ C16
+1.8V
RETURN
R18
R22
R27
U4
R26 COMP VREF
CS VDD
FB OUT
RTCT GND
ISL684x
R10
U3 C13 R15
R20
C8
Figure 1. 48V Input Dual Output Flyback
R13
C12
C11



Renesas ISL6841
VIN+
L1
Q1
R8 C10
CR1
R4
C1
VIN-
R1 R2
C4
U1
COMP VREF
FB VDD
CS OUT
RTCT GND
R3
C7
Figure 2. Boost Converter
+
C2
+VOUT
C3
RETURN
R5
C9
R7
VIN+
C8
R6
C5
C6







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