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MAX15005A Datasheet Download - Maxim Integrated

Номер произв MAX15005A
Описание 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers
Производители Maxim Integrated
логотип Maxim Integrated логотип 



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MAX15005A Даташит, Описание, Даташиты
EVALUATION KIT AVAILABLE
MAX15004A/B-MAX15005A/B
General Description
The MAX15004A/B/MAX15005A/B high-performance,
current-mode PWM controllers operate at an automotive
input voltage range from 4.5V to 40V (load dump). The
input voltage can go lower than 4.5V after startup if IN is
bootstrapped to a boosted output voltage. The controllers
integrate all the building blocks necessary for implementing
fixed-frequency isolated/nonisolated power supplies. The
general-purpose boost, flyback, forward, and SEPIC con-
verters 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 converters. The devices include
an internal error amplifier and 1% accurate reference to
facilitate the primary-side regulated, single-ended flyback
converter or nonisolated 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 combina-
tion of RT and CT.
The input undervoltage lockout (ON/OFF) programs the
input-supply startup voltage and can be used to shutdown
the converter to reduce the total shutdown current down
to 10µA. Protection features include cycle-by-cycle and
hiccup current limit, output over-voltage 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
Pin Configuration appears at end of data sheet.
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC
Power-Supply Controllers
Benefits and Features
● Wide Supply Voltage Range Meets Automotive
Power-Supply Operating Requirement Including
“Cold Crank” Conditions
• 4.5V to 40V Operating Input Voltage Range
(Can Operate at Lower Voltage After Startup if
Input is Bootstrapped to a Boosted Output)
● Control Architecture Offers Excellent Performance
While Simplifying the Design
• Current-Mode Control
• 300mV, 5% Accurate Current-Limit Threshold
Voltage
• Programmable Slope Compensation
• 50% (MAX15004) or Adjustable (MAX15005)
Maximum Duty Cycle
● Accurate, Adjustable Switching Frequency and
Synchronization Avoids Interference with Sensitive
Radio Bands
• Switching Frequency Adjustable from 15kHz to
500kHz (1MHz for the MAX15005A/B)
• RC Programmable 4% Accurate Switching
Frequency
• External Frequency Synchronization
● Built-In Protection Capability for Improved System
Reliability
• Cycle-by-Cycle and Hiccup Current-Limit
Protection
• Overvoltage and Thermal-Shutdown Protection
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified
Ordering Information
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
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.
19-0723; Rev 5; 9/15







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MAX15005A Даташит, Описание, Даташиты
MAX15004A/B-MAX15005A/B
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC
Power-Supply Controllers
Absolute Maximum Ratings
IN to SGND............................................................-0.3V to +45V
IN to PGND............................................................-0.3V to +45V
ON/OFF to SGND.......................................-0.3V to (VIN + 0.3V)
OVI, SLOPE, RTCT, SYNC, SS, FB, COMP,
CS to SGND...................................... -0.3V to (VREG5 + 0.3V)
VCC to PGND.........................................................-0.3V to +12V
REG5 to SGND........................................................-0.3V to +6V
OUT to PGND........................................... -0.3V to (VCC + 0.3V)
SGND to PGND.....................................................-0.3V to +0.3V
VCC Sink Current (clamped mode).....................................35mA
OUT Current (< 10μs transient)..........................................±1.5A
Continuous Power Dissipation* (TA = +70°C)
16-Pin TSSOP-EP (derate 21.3mW/°C
above +70°C).............................................................1702mW
16-Pin TSSOP (derate 9.4mW/°C above +70°C).............754mW
Operating Junction Temperature Range........... -40°C to +125°C
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -60°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
Soldering Temperature (reflow)........................................+260°C
*As per JEDEC51 Standard, Multilayer Board.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Electrical Characteristics
(VIN = 14V, CIN = 0.1μF, CVCC = 0.1μF // 1μF, CREG5 = 1μF, VON/OFF = 5V, CSS = 0.01μF, CSLOPE = 100pF, RT = 13.7kΩ, CT = 560pF,
VSYNC = VOVI = VFB = VCS = 0V, COMP = unconnected, OUT = unconnected. TA = TJ = -40°C to +125°C, unless otherwise noted.
Typical values are at TA = +25°C. All voltages are referenced to PGND, unless otherwise noted.) (Note 1) (Figure 5)
PARAMETER
POWER SUPPLY
Input Supply Range
Operating Supply Current
ON/OFF CONTROL
Input-Voltage Threshold
Input-Voltage Hysteresis
Input Bias Current
Shutdown Current
INTERNAL 7.4V LDO (VCC)
Output (VCC) Voltage Set Point
Line Regulation
UVLO Threshold Voltage
UVLO Hysteresis
Dropout Voltage
Output Current Limit
Internal Clamp Voltage
INTERNAL 5V LDO (REG5)
Output (REG5) Voltage Set Point
Line Regulation
Dropout Voltage
Output Current Limit
SYMBOL
CONDITIONS
VIN
IQ VIN = 40V, fOSC = 150kHz
VON
VHYST-ON
IB-ON/OFF
ISHDN
VON/OFF rising
VON/OFF = 40V
VON/OFF = 0V
VVCC
IVCC = 0 to 20mA (sourcing)
VIN = 8V to 40V
V­UVLO-VCC VCC rising
VHYST-UVLO
VIN = 4.5V, IVCC = 20mA (sourcing)
IVCC-ILIM IVCC sourcing
VVCC-CLAMP IVCC = 30mA (sinking)
VREG5
IREG5-ILIM
VCC = 7.5V, IREG5 = 0 to 15mA (sourcing)
VCC = 5.5V to 10V
VCC = 4.5V, IREG5 = 15mA (sourcing)
IREG5 sourcing
MIN
4.5
1.05
7.15
3.15
10.0
4.75
TYP
2
1.23
75
10
7.4
1
3.5
500
0.25
45
10.4
4.95
2
0.25
32
MAX UNITS
40.0
3.1
V
mA
1.40
0.5
20
V
mV
µA
µA
7.60
3.75
0.5
10.8
V
mV/V
V
mV
V
mA
V
5.05
0.5
V
mV/V
V
mA
www.maximintegrated.com
Maxim Integrated 2







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MAX15005A Даташит, Описание, Даташиты
MAX15004A/B-MAX15005A/B
4.5V to 40V Input Automotive
Flyback/Boost/SEPIC
Power-Supply Controllers
Electrical Characteristics (continued)
(VIN = 14V, CIN = 0.1μF, CVCC = 0.1μF // 1μF, CREG5 = 1μF, VON/OFF = 5V, CSS = 0.01μF, CSLOPE = 100pF, RT = 13.7kΩ, CT = 560pF,
VSYNC = VOVI = VFB = VCS = 0V, COMP = unconnected, OUT = unconnected. TA = TJ = -40°C to +125°C, unless otherwise noted.
Typical values are at TA = +25°C. All voltages are referenced to PGND, unless otherwise noted.) (Note 1) (Figure 5)
PARAMETER
OSCILLATOR (RTCT)
Oscillator Frequency Range
RTCT Peak Trip Level
RTCT Valley Trip Level
RTCT Discharge Current
SYMBOL
fOSC
VTH,RTCT
VTL,RTCT
IDIS,RTCT
Oscillator Frequency Accuracy
(Note 2)
Maximum PWM Duty Cycle
(Note 3)
DMAX
Minimum On-Time
SYNC Lock-In Frequency Range
(Note 4)
SYNC High-Level Voltage
SYNC Low-Level Voltage
SYNC Input Current
SYNC Minimum Input Pulse Width
ERROR AMPLIFIER/SOFT-START
Soft-Start Charging Current
SS Reference Voltage
SS Threshold for HICCUP Enable
tON-MIN
VIH-SYNC
VIL-SYNC
ISYNC
ISS
VSS
FB Regulation Voltage
VREF-FB
FB Input Offset Voltage
FB Input Current
COMP Sink Current
VOS-FB
ICOMP-SINK
CONDITIONS
fOSC = 2 x fOUT for MAX15004A/B,
fOSC = fOUT for MAX15005A/B
VRTCT = 2V
RT = 13.7kΩ, CT = 4.7nF,
fOSC (typ) = 18kHz
RT = 13.7kΩ, CT = 560pF,
fOSC (typ) = 150kHz
RT = 21kΩ, CT = 100pF,
fOSC (typ) = 500kHz
RT = 7kΩ, CT = 100pF,
fOSC (typ) = 1MHz
MAX15004A/B
MAX15005A/B,
RT = 13.7kΩ, CT = 560pF,
fOSC (typ) = 150kHz
VIN = 14V
RT = 13.7kΩ, CT = 560pF,
fOSC (typ) = 150kHz
VSYNC = 0 to 5V
VSS = 0V
VSS rising
COMP = FB,
ICOMP = -500µA to +500µA
COMP = 0.25V to 4.5V,
ICOMP = -500µA to +500µA,
VSS = 0 to 1.5V
VFB = 0 to 1.5V
VFB = 1.5V, VCOMP = 0.25V
MIN TYP MAX UNITS
15 1000
0.55 x VREG5
0.1 x VREG5
1.30 1.33 1.36
-4 +4
kHz
V
V
mA
-4 +4
%
-5 +5
-7 +7
50
78.5 80 81.5
%
110 170
ns
102 200 %fOSC
2V
0.8 V
-0.5
+0.5
µA
50 ns
8
1.215
1.215
15
1.228
1.1
1.228
21
1.240
1.240
µA
V
V
V
-5 +5 mV
-300
3
+300
5.5
nA
mA
www.maximintegrated.com
Maxim Integrated 3










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