MAX15000AEUB+ Maxim Integrated Products, MAX15000AEUB+ Datasheet

IC CNTRLR PWM CURRENT MD 10UMAX

MAX15000AEUB+

Manufacturer Part Number
MAX15000AEUB+
Description
IC CNTRLR PWM CURRENT MD 10UMAX
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX15000AEUBT.pdf (18 pages)

Specifications of MAX15000AEUB+

Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
2.5MHz
Duty Cycle
50%
Voltage - Supply
23.6 V ~ 30 V
Buck
No
Boost
Yes
Flyback
Yes
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
Yes
Operating Temperature
-40°C ~ 85°C
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Frequency-max
2.5MHz
Duty Cycle (max)
50 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
25 KHz to 625 KHz
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Synchronous Pin
No
Topology
Boost
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX15000/MAX15001 current-mode PWM con-
trollers contain all the control circuitry required for the
design of wide-input-voltage isolated and nonisolated
power supplies. The MAX15000 is well suited for uni-
versal input (rectified 85VAC to 265VAC) or telecom
(-36VDC to -72VDC) power supplies. The MAX15001
is well suited for low input voltage (9.5VDC to 24VDC)
power supplies.
The MAX15000/MAX15001 contain an internal error
amplifier that regulates the tertiary winding output volt-
age which is used in primary-side-regulated isolated
power supplies. Primary-side regulation eliminates the
need for an optocoupler. An input undervoltage lockout
(UVLO) is provided for programming the input-supply
start voltage and to ensure proper operation during
brownout conditions. An open-drain UVLO flag output,
with 210µs internal delay, allows the sequencing of a
secondary-side controller. The input-supply start volt-
age is externally programmable with a voltage-divider.
A UVLO/EN input is used to shutdown the MAX15000/
MAX15001. Internal digital soft-start eliminates output
voltage overshoot.
The MAX15000 has an internal bootstrap UVLO with
large hysteresis that requires a minimum 23.6V for start-
up. The MAX15001 does not have the internal bootstrap
UVLO and can be biased directly from a minimum volt-
age of 9.5V.
The switching frequency for the MAX15000/MAX15001 is
programmable with an external resistor. The MAX15000A/
MAX15001A provide a 50% maximum duty-cycle limit,
while the MAX15000B/MAX15001B provide a 75% maxi-
mum duty-cycle limit. These devices are available in 10-
pin µMAX
-40°C to +85°C temperature range.
19-3957; Rev 0; 1/06
Selector Guide appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1/2, 1/4, and 1/8th Brick Power Modules
High-Efficiency, Isolated Telecom Power
Supplies
Networking/Servers
Isolated Keep-Alive Power Supplies
12V Boost and SEPIC Regulators
Isolated and Nonisolated High-Brightness LED
Power Supplies
Industrial Power Conversion
®
packages and are rated for operation over the
________________________________________________________________ Maxim Integrated Products
General Description
Programmable Switching Frequency
Current-Mode PWM Controllers with
Applications
♦ Current-Mode Control
♦ Programmable Switching Frequency Up to 625kHz
♦ Accurate UVLO Threshold (1%)
♦ Open-Drain UVLO Flag Output with Internal Delay
♦ 36V to 72V Telecom Voltage Range
♦ Universal Offline Input Voltage Range
♦ 9.5V to 24V Input (MAX15001)
♦ Digital Soft-Start
♦ Internal Bootstrap UVLO with Large Hysteresis
♦ Internal Error Amplifier with 1.5% Accurate
♦ 50µA (typ) Startup Supply Current
♦ 50% Maximum Duty-Cycle Limit
♦ 75% Maximum Duty-Cycle Limit
♦ 60ns Cycle-by-Cycle Current-Limit Propagation
♦ Available in Tiny 10-Pin µMAX Packages
Warning: The MAX15000/MAX15001 are designed to work with
high voltages. Exercise caution.
+Denotes lead-free package.
MAX15000AEUB+ -40°C to +85°C
MAX15000BEUB+ -40°C to +85°C
MAX15001AEUB+ -40°C to +85°C
MAX15001BEUB+ -40°C to +85°C
(MAX15000)
Reference
(MAX15000A/MAX15001A)
(MAX15000B/MAX15001B)
Delay
TOP VIEW
Rectified 85VAC to 265VAC (MAX15000)
PART
UVLO/EN
COMP
UFLG
CS
FB
1
2
3
4
5
TEMP RANGE
Ordering Information
MAX15000
MAX15001
µMAX
Pin Configuration
PIN-
PACKAGE
10 µMAX
10 µMAX
10 µMAX
10 µMAX
10
9
8
7
6
IN
V
NDRV
GND
RT
CC
Features
CODE
U10-2
U10-2
U10-2
U10-2
PKG
1

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MAX15000AEUB+ Summary of contents

Page 1

... Maximum Duty-Cycle Limit (MAX15000B/MAX15001B) ♦ 60ns Cycle-by-Cycle Current-Limit Propagation Delay ♦ Available in Tiny 10-Pin µMAX Packages PART MAX15000AEUB+ -40°C to +85°C MAX15000BEUB+ -40°C to +85°C MAX15001AEUB+ -40°C to +85°C MAX15001BEUB+ -40°C to +85°C Warning: The MAX15000/MAX15001 are designed to work with Applications high voltages ...

Page 2

Current-Mode PWM Controllers with Programmable Switching Frequency ABSOLUTE MAXIMUM RATINGS IN to GND ...............................................................-0.3V to +30V IN Clamp (Internal Shunt) Current ........................................5mA V to GND ............................................................-0.3V to +13V CC FB, COMP, UVLO/EN, RT GND .....................-0.3V to +6V UFLG ...

Page 3

Current-Mode PWM Controllers with Programmable Switching Frequency ELECTRICAL CHARACTERISTICS (continued +12V (for MAX15000, bring 23.6V for startup), 10nF bypass capacitors at IN and 7.5kΩ (MAX1500_B), R15 = 1kΩ 100nF ...

Page 4

Current-Mode PWM Controllers with Programmable Switching Frequency ELECTRICAL CHARACTERISTICS (continued +12V (for MAX15000, bring 23.6V for startup), 10nF bypass capacitors at IN and 7.5kΩ (MAX1500_B), R15 = 1kΩ 100nF ...

Page 5

Current-Mode PWM Controllers with Programmable Switching Frequency (V = +1.4V +1V, COMP = open, V UVLO/EN FB UVLO/EN SHUTDOWN THRESHOLD vs. TEMPERATURE 1.180 UVLO/EN FALLING 1.175 1.170 1.165 1.160 1.155 1.150 -40 - TEMPERATURE ...

Page 6

Current-Mode PWM Controllers with Programmable Switching Frequency (V = +1.4V +1V, COMP = open, V UVLO/EN FB SWITCHING FREQUENCY vs. TIMING RESISTOR 1000 MAX15000A 100 100 1000 TIMING RESISTOR (kΩ) UVLO/EN TO UFLG PROPAGATION DELAY ...

Page 7

Current-Mode PWM Controllers with Programmable Switching Frequency (V = +1.4V +1V, COMP = open, V UVLO/EN FB NDRV HIGH OUTPUT IMPEDANCE vs. TEMPERATURE 5.0 SOURCING 20mA 4.6 4.2 3.8 3.4 3.0 -40 - TEMPERATURE (°C) PIN ...

Page 8

Current-Mode PWM Controllers with Programmable Switching Frequency Detailed Description The MAX15000/MAX15001 current-mode PWM con- trollers are ideal for isolated and nonisolated power- supply applications. The devices offer an accurate input startup voltage programmable through the UVLO/EN input. This feature prevents ...

Page 9

Current-Mode PWM Controllers with Programmable Switching Frequency Current-Mode Control Loop The advantages of current-mode control over voltage- mode control are twofold. First, there is the feed-for- ward characteristic brought on by the controller’s ability to adjust for variations in the ...

Page 10

Current-Mode PWM Controllers with Programmable Switching Frequency threshold), then startup has been accomplished and sustained operation will commence 9.74V before startup is complete, the device goes back to low-current UVLO. In this case, increase the value of C1 ...

Page 11

Current-Mode PWM Controllers with Programmable Switching Frequency n-Channel MOSFET Switch Driver The NDRV output drives an external n-channel MOSFET. The internal regulator output (V ), set to approximately CC 9V, drives NDRV. For the universal input voltage range, the MOSFET ...

Page 12

Current-Mode PWM Controllers with Programmable Switching Frequency The current-sense resistor (R4 in Figure 1), connected between the source of the MOSFET and ground, sets the current limit. The current-limit comparator has a voltage trip level ( 1V. Use ...

Page 13

Current-Mode PWM Controllers with Programmable Switching Frequency Choose a higher value for R1 than the one calculated in the previous equation if a longer startup time can be tolerated to minimize power loss on this resistor. The above startup method ...

Page 14

Current-Mode PWM Controllers with Programmable Switching Frequency FB_P IN D8 C16 C12 1µF 15µF R6 35V 35V +VIN 33kΩ 36V TO 72V +VIN C1 C2 -VIN 1µF 1µF 100V 100V FB_P R1 22.6kΩ +VIN ...

Page 15

Current-Mode PWM Controllers with Programmable Switching Frequency 12V Figure 8. 12V to 15V Output Boost Regulator Layout Recommendations Typically, there are two sources of noise emission in a switching power supply: high di/dt loops and high dv/dt ...

Page 16

Current-Mode PWM Controllers with Programmable Switching Frequency 36V TO 72V C5 R11 - ______________________________________________________________________________________ R5 UVLO/ UFLG MAX15000 FB NDRV 3 8 COMP GND ...

Page 17

Current-Mode PWM Controllers with Programmable Switching Frequency IN IN CLAMP 26.1V DIGITAL SOFT-START UVLO/EN COMP FB ERROR AMP 1. Selector Guide BOOTSTRAP STARTUP PART UVLO VOLTAGE (V) MAX15000A Yes MAX15000B Yes MAX15001A* No MAX15001B* No *The ...

Page 18

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products ...

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