PWM Controller. ISL71041M Datasheet

ISL71041M Controller. Datasheet pdf. Equivalent


intersil ISL71041M
Datasheet
ISL71043M, ISL71041M
Radiation Tolerant Single-Ended Current Mode PWM Controllers
The ISL71043M and ISL71041M are PWM controllers
suitable for a wide range of power conversion
applications including boost, flyback, and isolated
output configurations. Fast signal propagation and
output switching characteristics make these ideal
products for existing and new designs.
Features include up to 13.2V operation, 2.9mA
operating current, 90µA typical start-up current,
adjustable operating frequency to 1MHz and, 1A
current drive capability with 35ns rise and 29ns fall
times.
The ISL71041M and ISL71043M are available in an
8 LD TDFN package and the ISL71043M is also
available in an 8 LD SOIC package. Both packages
are specified across the extended temperature range
of -55°C to +125°C.
Applications
• Current mode switching power supplies
• Isolated buck and flyback regulators
• Boost regulators
• Direction and speed control in motors
• Control of high current FET drivers
Related Literature
For a full list of related documents, visit our website:
ISL71041M and ISL71043M device pages
Features
• 1A MOSFET gate driver
• 90µA typical start-up current, 125µA maximum
• Moisture Sensitivity Level (MSL) rating is 1
• 35ns propagation delay current sense to output
• Fast transient response with Peak Current mode
control
• 9V to 13.2V operation
• Adjustable switching frequency to 1MHz
• 35ns rise time and 29ns fall time with 1nF output
load
• Trimmed timing capacitor discharge current for
accurate dead time/maximum duty cycle control
• 1.5MHz bandwidth error amplifier
• Tight tolerance voltage reference over line, load,
and temperature
• ±3% current limit threshold
• Ni/Pd/Au-Ag lead finish (Tin (Sn) free)
• Characterized radiation levels
Low Dose Rate (LDR) (0.01rad(Si)/s): 30krad(Si)
Single event burnout LET 43MeV•cm2/mg
Table 1. Key Differences Between Family of Parts
Part Number
Rising UVLO (V)
Maximum Duty Cycle (%)
ISL71041M
7.0
50
ISL71043M
8.4
100
Packages Available
8 Ld TDFN
8 Ld TDFN, 8 Ld SOIC
R34DS0003EU0500 Rev.5.00
Sep.30.20
Page 1 of 26


ISL71041M Datasheet
Recommendation ISL71041M Datasheet
Part ISL71041M
Description Radiation Tolerant Single-Ended Current Mode PWM Controller
Feature ISL71041M; Datasheet ISL71043M, ISL71041M Radiation Tolerant Single-Ended Current Mode PWM Controllers The IS.
Manufacture intersil
Datasheet
Download ISL71041M Datasheet




intersil ISL71041M
ISL71043M, ISL71041M
Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Typical Application Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2. Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Outgas Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Thermal Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Typical Performance Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Soft-Start Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.4 Gate Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.5 Slope Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.6 Fault Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.7 Ground Plane Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5. Radiation Tolerance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.1 Total Ionizing Dose (TID) Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Single-Event Effects Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7. Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. Package Outline Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
R34DS0003EU0500 Rev.5.00
Sep.30.20
Page 2 of 26



intersil ISL71041M
1. Overview
1.1 Typical Application Schematics
VIN+
36V to 75V
C1
VIN-
R3
C4
C2
R1
CR6
C3
Q1
R4
R6
Q3
VR1
CR1
CR5
T1
R21
C21
+ C15
C5
CR2
CR4 +
C22
+
C17
C19
C20
+3.3V
+ C16
+1.8V
Return
C6
R28
R22
R27
R26
U4
COMP VREF
CS
VDD
FB
OUT
RTCT GND
ISL71041M, ISL71043M
R10
C8
R16
U2
R17
R19
R18
C14
C13
R15
U3
R20
C12
C11
R13
Figure 1. 48V Input Dual Output Flyback







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