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MAX15004 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX15004
Description  4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX15004 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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General Description
The MAX15004A/B/MAX15005A/B high-performance,
current-mode PWM controllers operate at an automo-
tive input voltage range from 4.5V to 40V (load dump).
The input voltage can go down as low as 2.5V after
startup if VCC is supplied by an external bias voltage.
The controllers integrate all the building blocks neces-
sary for implementing fixed-frequency isolated/noniso-
lated power supplies. The general-purpose boost,
flyback, forward, and SEPIC converters can be
designed with ease around the MAX15004/MAX15005.
The current-mode control architecture offers excellent
line-transient response and cycle-by-cycle current limit
while simplifying the frequency compensation.
Programmable slope compensation simplifies the
design further. A fast 60ns current-limit response time,
low 300mV current-limit threshold makes the controllers
suitable for high-efficiency, high-frequency DC-DC con-
verters. The devices include an internal error amplifier
and 1% accurate reference to facilitate the primary-side
regulated, single-ended flyback converter or nonisolat-
ed converters.
An external resistor and capacitor network programs
the switching frequency from 15kHz to 500kHz (1MHz for
the MAX15005A/B). The MAX15004A/B/MAX15005A/B
provide a SYNC input for synchronization to an external
clock. The maximum FET-driver duty cycle for the
MAX15004A/B is 50%. The maximum duty cycle can be
set on the MAX15005A/B by selecting the right combi-
nation of RT and CT.
The input undervoltage lockout (ON/OFF) programs the
input-supply startup voltage and can be used to shut-
down the converter to reduce the total shutdown cur-
rent down to 10µA. Protection features include
cycle-by-cycle and hiccup current limit, output overvolt-
age protection, and thermal shutdown.
The MAX15004A/B/MAX15005A/B are available in
space-saving 16-pin TSSOP and thermally enhanced
16-pin TSSOP-EP packages. All devices operate over
the -40°C to +125°C automotive temperature range.
Applications
Automotive
Vacuum Fluorescent Display (VFD) Power
Supply
Isolated Flyback, Forward, Nonisolated SEPIC,
Boost Converters
Features
♦ Wide 4.5V to 40V Operating Input Voltage Range
♦ Operates Down to 2.5V (with Bootstrapped VCC
Bias)
♦ Current-Mode Control
♦ Low 300mV, 5% Accurate Current-Limit Threshold
Voltage
♦ Internal Error Amplifier with 1% Accurate Reference
♦ RC Programmable 4% Accurate Switching
Frequency
♦ Switching Frequency Adjustable from 15kHz to
500kHz (1MHz for the MAX15005A/B)
♦ External Frequency Synchronization
♦ 50% (MAX15004) or Adjustable (MAX15005)
Maximum Duty Cycle
♦ Programmable Slope Compensation
♦ 10µA Shutdown Current
♦ Cycle-by-Cycle and Hiccup Current-Limit
Protection
♦ Overvoltage and Thermal Shutdown Protection
♦ -40°C to +125°C Automotive Temperature Range
♦ 16-Pin TSSOP or 16-Pin Thermally Enhanced
TSSOP-EP Packages
♦ AEC-Q100 Qualified
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC Power-Supply Controllers
________________________________________________________________
Maxim Integrated Products
1
PART
PIN-PACKAGE
MAX DUTY CYCLE
MAX15004AAUE+
16 TSSOP-EP*
50%
MAX15004AAUE/V+
16 TSSOP-EP*
50%
MAX15004BAUE+
16 TSSOP
50%
MAX15004BAUE/V+
16 TSSOP
50%
MAX15005AAUE+
16 TSSOP-EP*
Programmable
MAX15005AAUE/V+
16 TSSOP-EP*
Programmable
MAX15005BAUE+
16 TSSOP
Programmable
MAX15005BAUE/V+
16 TSSOP
Programmable
Ordering Information
19-0723; Rev 3; 1/11
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Note: All devices are specified over the -40°C to +125°C
temperature range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*
EP = Exposed pad.
Pin Configurations appear at end of data sheet.
EVALUATION
KIT
AVAILABLE


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