|
Details, datasheet, quote on part number:PTH12020WAST
| |
Datasheet text preview:
PTH12020W/L --12-V Input
18-A, 12-V Input Non-Isolated Wide-Output Adjust Power Module
SLTS208D MAY 2003 REVISED JUNE 2004
Features
· Up to 18 A Output Current · 12-V Input Voltage · Wide-Output Voltage Adjust (1.2 V to 5.5 V)/(0.8 V to 1.8 V) · Efficiencies up to 95 % · 195 W/in³ Power Density · On/Off Inhibit · Output Voltage Sense · Pre-Bias Startup · Under-Voltage Lockout · Auto-TrackTM Sequencing · Margin Up/Down Controls · Output Over-Current Protection (Non-Latching, Auto-Reset) · Over-T mperature Protection e · Operating Temp: 40 to +85 °C · Safety Agency Approvals: UL/cUL 60950, EN60950 VDE (Pending) · Point-of-Load Alliance (POLA) Compatible
NOMINAL SIZE =
1.5 in x 0.87 in (38,1 mm x 22,1 mm)
Description
The PTH12020 series of non-isolated power modules offers OEM designers a combination of high performance, small footprint, and industry leading features. As part of a new class of power modules, these products provide designers with the flexibility to power the most complex m u l t i - p r o c e s s o r digital systems using off-the-shelf catalog parts. The series employs double-sided surface mount construction and provides highperformance step-down power conversion for up to 18 A of output current from a 12-V input bus voltage. The output voltage of the W-suffix parts can be set to any value over the range, 1.2 V to 5.5 V. The L-suffix parts have an adjustment range of 0.8 V to 1.8 V. The output voltage is set using a single resistor. T h i s series includes Auto-TrackTM. Auto-Track simplifies the task of supply voltage sequencing in a power system by enabling modules to track each other, or any external voltage, during power up and power down. Other operating features include an on/off inhibit, output voltage adjust (trim), margin up/down controls, and the ability to start up into an existing output voltage or prebias. For improved load regulation, an output voltage sense is provided. A non-latching over-current trip and overt e m p e r a t u r e shutdown feature protects against load faults. Targ e t applications include complex m u l t i - v o l t a g e , multi-processor systems that incorporate the industry's high-speed DSPs, micro-processors and bus drivers.
Pin Configuration
Pin
1 2 3 4 5 6 7 8 9 10
Function
GND Vin Inhibit * Vo Adjust Vo Sense Vout GND Track Margin Down * Margin Up *
* Denotes negative logic: Open = Normal operation Ground = Function active
TM Track Auto- n c i n g e Sequ
Standard Application
T ra ck Ma rg in Down Ma rg in Up
10 1 9 8 7
Rset = Required to set the output voltage to a value higher than the lowest value. (See spec. table for values) Cin = Required electrolytic 560 µF Cout = Optional 330 µF electrolytic
VIN
P T H 12 02 0x (To p View)
2 6
VO UT
3
4
5
Inh ibit R SET, 1% (R equired)
V o Sense
L O A D
GND
For technical support and further information, visit http://power.ti.com
+
CIN 56 0 µF (Required)
C OU T 330 µF (Optional) GN D
+
PTH12020W/L --12-V Input
18-A, 12-V Input Non-Isolated Wide-Output Adjust Power Module
SLTS208D MAY 2003 REVISED JUNE 2004
Ordering Information Output Voltage (PTH12020xx)
Code W L Voltage 1.2 V 5.5 V (Adjust) 0.8 V - 1.8 V (Adjust)
Package Options (PTH12020x) (1)
Code AH AS Description Horiz. T/H SMD, Standard (3) Pkg Ref. (EUK) (EUL)
(2)
Notes: (1) Add "T" to end of part number for tape and reel on SMD packages only. (2) Reference the applicable package reference drawing for the dimensions and PC board layout (3) "Standard" option specifies 63/37, Sn/Pb pin solder material.
Pin Descriptions
Vin: The positive input voltage power node to the module, which is referenced to common GND. Vout: The regulated positive power output with respect to the GND node. GND: This is the common ground connection for the Vin and Vout power connections. It is also the 0 VDC reference for the control inputs. Inhibit: The Inhibit pin is an open-collector/drain negative logic input that is referenced to GND. Applying a lowlevel ground signal to this input disables the module's output and turns off the output voltage. When the Inhibit control is active, the input current drawn by the regulator is significantly reduced. If the inhibit feature is not used, the control pin should be left open-circuit. The module will then produce an output whenever a valid input source is applied. Vo Adjust: A 1% resistor must be connected directly between this pin and GND (pin 7) to set the output voltage of the module higher than its lowest value. The temperature stability of the resistor should be 100 ppm/°C (or better). The set point range is 1.2 V to 5.5 V for W-suffix devices, and 0.8 V to 1.8 V for L-suffix devices. The resistor value required for a given output voltage may be calculated using a formula. If left open circuit, the module output voltage will default to its lowest value. For further information on output voltage adjustment consult the related application note. The specification table gives the preferred resistor values for a number of standard output voltages. Vo Sense: The sense input allows the regulation circuit to compensate for voltage drop between the module and the load. For optimal voltage accuracy Vo Sense should be connected to Vout. It can also be left disconnected. Track: This is an analog control input that enables the output voltage to follow an external voltage. This pin becomes active typically 20 ms after the input voltage has been applied, and allows direct control of the output voltage from 0 V up to the nominal set-point voltage. Within this range the output will follow the voltage at the Track pin on a volt-for-volt basis. When the control voltage is raised above this range, the module regulates at its set-point voltage. The feature allows the output voltage to rise simultaneously with other modules powered from the same input bus. If unused this input should be connected to Vin. Note: Due to the under-voltage lockout feature, the output of the module cannot follow its own input voltage during power up. For more information, consult the related application note. Margin Down: When this input is asserted to GND, the output voltage is decreased by 5% from the nominal. The input requires an open-collector (open-drain) interface. It is not TTL compatible. A lower percent change can be accomodated with a series resistor. For further information, consult the related application note. Margin Up: When this input is asserted to GND, the output voltage is increased by 5%. The input requires an open-collector (open-drain) interface. It is not TTL compatible. The percent change can be reduced with a series resistor. For further information, consult the related application note.
Environmental & Absolute Maximum Ratings
Characteristics Track Input Inhibit Control Input Operating T mperature Range e Solder Reflow T mperature e Storage T mperature e Mechanical Shock Mechanical Vibration Weight Flammability -- -- Symbols Vtrack Vinh Ta Treflow Ts
(Voltages are with respect to GND) Min 0.3 0.3 40 40 -- -- -- Typ -- -- -- -- 500 20 7 Max Vin + 0.3 7 85 235 (i) 125 -- -- -- Units V V °C °C °C G's G's grams
Conditions
Over Vin Range Surface temperature of module body or pins -- Per Mil-STD-883D, Method 2002.3 1 msec, ½ Sine, mounted Mil-STD-883D, Method 2007.2 20-2000 Hz Meets UL 94V-O
Notes: (i) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.
For technical support and further information, visit http://power.ti.com
PTH12020W --12-V Input
18-A, 12-V Input Non-Isolated Wide-Output Adjust Power Module
SLTS208D MAY 2003 REVISED JUNE 2004
Specifications
Characteristics Output Current
(Unless otherwise stated, T a =25 °C, Vin =12 V, V out =3.3 V, C in =560 µF, C out =0 µF, and I o =Io max) Symbols Io Vin Vo tol Regtemp Regline Regload Regtot Vadj Conditions 60 °C, 200 LFM airflow 25 °C, natural convection Over Io range 40 °C 2.5 V Reset, followed by auto-recovery 1 A/µs load step, 50 to 100 % Iomax, Cout =330 µF Recovery Time Vo over/undershoot Pin to GND Pin to GND Cout Cout(max) Vin increasing Vin decreasing Referenced to GND Pin to GND Inhibit (pin 3) to GND, Track (pin 8) open Over Vin and Io ranges non-ceramic ceramic Equiv. series resistance (non-ceramic) Per Bellcore TR-332 50 % stress, Ta =40 °C, ground benign Capacitance value Min 0 0 10.8 -- -- -- -- -- 1.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 8.8 2 0.2 -- -- 260 560 (5) 0 0 4 (8) 5.3
PTH12020W Typ
-- -- -- -- ±0.5 ±5 ±5 -- -- 95 93 92 90 88 86 32 1 30 70 70 ±5 8 -- -- 9.7 9.2
Max 18 (1) 18 (1) 13.2 ±2 (2) -- -- -- ±3 5.5 -- -- -- -- -- -- -- -- -- -- -- -- -- 0.13 1 10.4 -- Open 0.5 -- -- 380 -- 9,900 300 -- --
(4) (2)
Units A V %Vo %Vo mV mV %Vo V
Input Voltage Range Set-Point Voltage T lerance o Temperature Variation Line Regulation Load Regulation Total Output Variation Output Voltage Adjust Range Efficiency
%
Vo Ripple (pk-pk) Over-Current Threshold Transient Response
Vr Io trip ttr Vtr Vo margin IIL margin IIL track dVtrack/dt UVLO VIH VIL IIL inhibit Iin inh s Cin Cout
mVpp % Vo A µSec mV % µA mA V/ms V
Margin Up/Down Adjust Margin Input Current (pins 9 /10) Track Input Current (pin 8) Track Slew Rate Capability Under-Voltage Lockout Inhibit Control (pin3) Input High Voltage Input Low Voltage Input Low Current Input Standby Current Switching Frequency External Input Capacitance External Output Capacitance
(3)
-- -- 0.24 5 320 -- 330 (6) -- -- --
V mA mA kHz µF
(7)
µF m 106 Hrs
Reliability
MTBF
Notes: (1) See SOA curves or consult factory for appropriate derating. (2) The set-point voltage tolerance is affected by the tolerance and stability of R SET. The stated limit is unconditionally met if RSET has a tolerance of 1 %, with 100 ppm/°C or better temperature stability. (3) A small low-leakage (<100 nA) MOSFET is recommended to control this pin. The open-circuit voltage is less than 1 Vdc. (4) This control pin is pulled up to an internal supply voltage. To avoid risk of damage to the module, do not apply an external voltage greater than 7 V If . this input is left open-circuit the module will operate when input power is applied. A small low-leakage (<100 nA) MOSFET is recommended for control. For further information, consult the related application note. (5) A 560 µF electrolytic input capacitor is required for proper operation. The capacitor must be rated for a minimum of 800 mA rms of ripple current. (6) An external output capacitor is not required for basic operation. Adding 330 µF of distributed capacitance at the load will improve the transient response. (7) This is the calculated maximum. The minimum ESR limitation will often result in a lower value. Consult the application notes for further guidance. (8) This is the typcial ESR for all the electrolytic (non-ceramic) output capacitance. Use 7 m as the minimum when using max-ESR values to calculate.
For technical support and further information, visit http://power.ti.com
|
|
