LNBP8L, LNBP9L
LNBP10L, LNBP11L
LNB supply and control voltage regulator
Features
■Simplest integrated solution for LNB remote supply and control
■500 mA guaranteed output current
■Dual input supply for reducing power dissipation (DFN package)
■3-state function to enable/disable and select the output voltage level through a single pin
■Fast oscillator startup for DiSEq™ encoding (LNBP9L/11L versions)
■External 22 kHz modulation input pin (LNBP8L/10L versions)
■Cable length compensation, LLC pin (LNBP10L, LNBP11L versions)
■Short-circuit and over-temperature protection
■LNB overload and short-circuit dynamic protection (LNBP10L, LNBP11L versions)
■Available in DFN8 (5 x 6 mm) and IPPAK packages
Description
Intended for analog and digital satellite receivers, the LNBP is a monolithic linear voltage regulator, assembled in the DFN8 (5 x 6) and IPPAK packages, specifically designed to provide the powering voltages and the interfacing signals to the LNB down-converter. The regulator output can be logic controlled for 13 V or 18 V (typ.) by means of the EN/VSEL 3-state pin for remotely controlling the LNB. When the IC is powered and put in standby (EN/VSEL pin at high impedance), the regulator output is disabled. In order to reduce power dissipation, the LNBP10L/11L versions (on DFN package) feature 2 supply inputs: VCC1 and VCC2. These pins must be powered, respectively, at 15 V (min.) and 22 V (min.), and an internal switch will automatically select the appropriate supply voltage according to the selected output voltage. The LNBP8L/9L versions (in the IPPAK package) have only one supply input pin, which
IPPAK |
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DFN8 (5 x 6 mm) |
must be supplied at 22 V (min.). Additionally, the LNBP10L/11L versions have the LLC pin to increment the selected output voltage value by 1 V (typ.) to compensate for the excess voltage drop along the coaxial cable (LLC pin HIGH). An analog 22 kHz modulation input pin (EXTM) is available in the LNBP8L and LNBP10L versions. An appropriate DC blocking capacitor must be used to couple the modulating signal source to the EXTM pin. The LNBP10L/11L versions are also equipped with over-current dynamic protection: as soon as an overload is detected the
output is shut down for the time TOFF, which is determined by the capacitor connected between
the CEXT pin and GND. After the time has elapsed, the output is resumed for a time TON = (1/12)*TOFF (typ.). If the overload is still present, the protection circuit will cycle again through TOFF and TON until the overload is removed. A typical
TON+TOFF value is 1100 ms when a 4.7 µF external capacitor is used on the CEXT. This
dynamic operation can greatly reduce the power dissipation in short-circuit condition, while ensuring excellent power-on startup even with highly capacitive loads on the LNB outputs. The device is packaged in the IPPAK for through-hole mounting and in the DFN8 (5 x 6) for surface mounting. Both package solutions are offered in two versions: with ten pins (LNBP9L/11L) to use with the integrated 22 kHz tone generator, or with the EXTM pin (LNBP8L/10L) to use external 22 kHz sources. All versions have built-in thermal protection to prevent overheating damage.
August 2010 |
Doc ID 15153 Rev 2 |
1/21 |
www.st.com
Contents |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
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Contents
1 |
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Detailed description and application hints . . . . . . . . . . . . . . . . . . . . . . . |
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6.1 |
Input voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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6.2 |
Single supply for the DFN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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IPPAK mounting and thermal considerations . . . . . . . . . . . . . . . . . . . . . . |
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Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
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2/21 |
Doc ID 15153 Rev 2 |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
Diagram |
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VCC1 |
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VCC2 |
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RSENSE |
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EN/VSEL |
TRISTATE ENABLE & |
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VOUT SELECTION |
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LLC |
VOLTAGE |
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REFERENCE |
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OUTPUT |
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CEXT |
DYNAMIC |
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CURRENT LIMIT |
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THERMAL
PROTECTION
TEN |
22kKHz |
EXTM |
OSCILLATOR |
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LNBP8L/9L/10L/11L
GND
Doc ID 15153 Rev 2 |
3/21 |
Pin configuration |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
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IPPAK |
DFN8 (5 x 6 mm) |
Table 1. |
Pin description |
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Pin n° (DFN) |
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Pin n° |
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(IPPAK) |
Name |
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Pin function |
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LNBP10/11L |
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LNBP8/9L |
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VCC1 |
Supply input 1: 15 V to 25 V supply. For DFN package it is |
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automatically selected when VOUT = 13 V. For IPPAK package |
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(not available for |
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V |
CC1 |
and V |
CC2 |
are internally connected together to pin 1 to be |
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IPPAK) |
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supplied at 22 V min. |
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VCC2 |
Supply input 2: 22 V to 25 V supply. For DFN package it is |
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automatically selected when VOUT = 18 V. For IPPAK package |
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2 |
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1 |
(VCC pin for |
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VCC1 and VCC2 are internally connected together to the pin 1 to be |
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IPPAK) |
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supplied at 22 V min. |
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3 |
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OUTPUT |
Output: regulator output. It is 13 V typ when EN/VSEL LOW and |
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18 V typ when EN/VSEL HIGH. |
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4, ePAD |
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3, ePAD |
GROUND |
GROUND |
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Enable and output voltage selection 3-state pin: logic control |
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4 |
EN/VSEL |
input 3-state pin for the remote controlling of the LNB; if LOW |
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VOUT = 13 V, when HIGH VOUT = 18 V, if left at high impedance the |
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IC is set in shut down mode (VOUT = 0 V) |
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Tone enable (LNBP9-11): logic control input to enable internal |
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EXTM/TEN |
tone generator. |
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External modulation (LNBP8-10): Needs DC decoupling to the |
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AC source. If not used can be left floating. |
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NA |
LLC |
LLC: logic control input to add 1 V typ. |
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NA |
CEXT |
CEXT: timing capacitor used by the dynamic overload protection. |
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Typical application is 4.7 µF for a 1100 ms cycle |
4/21 |
Doc ID 15153 Rev 2 |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
Maximum ratings |
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3 |
Maximum ratings |
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Table 2. |
Absolute maximum ratings |
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Symbol |
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Parameter |
Value |
Unit |
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VCC1, VCC2 |
Input voltages |
-0.3 to 28 |
V |
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VCC1-OUTPUT |
VCC1 voltage with respect to OUTPUT voltage (1) |
-0.3 to 25 |
V |
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VCC2-OUTPUT |
VCC2 voltage with respect to OUTPUT voltage (1) |
-0.3 to 25 |
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EN/VSEL, TEN, |
Logic input voltage |
-0.3 to 7 |
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LLC |
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EXTM |
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External modulation input voltage |
-0.3 to 1 |
V |
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OUTPUT |
Output voltage |
-0.3 to 25 |
V |
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TSTG |
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Storage temperature range |
-50 to 150 |
°C |
ESD |
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ESD rating with human body model (HBM) for all pins except 1, 2, 6 |
2 |
kV |
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DFN package |
ESD rating with human body model (HBM) for pins 1, 2, 6 |
1.5 |
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ESD |
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ESD rating with human body model (HBM) for all pins except 1, 4 |
2 |
kV |
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IPPAK package |
ESD rating with human body model (HBM) for pins 1, 4 |
1.5 |
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1.Exposure beyond the VCC1 and VCC2 with respect to OUTPUT absolute-maximum-rated voltages during OUTPUT pin overload or short-circuit to GROUND may cause permanent damage to the device.
Note: |
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Absolute maximum ratings are those values beyond which damage to the device may occur. |
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These are stress ratings only and functional operation of the device at these conditions is |
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not implied. Exposure to absolute-maximum-rated conditions for extended periods may |
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affect device reliability. All voltage values are with respect to network ground terminal unless |
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otherwise stated. |
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Table 3. |
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Operating ratings |
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Parameter |
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Value |
Unit |
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TJ |
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Operating junction temperature range |
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0 to 125 |
°C |
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VCC1 |
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Input voltage |
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15 to 25 |
V |
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VCC2 |
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Input voltage |
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22 to 25 |
V |
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Table 4. |
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Thermal data |
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Symbol |
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Parameter |
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IPPAK |
DFN8 |
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Unit |
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RthJA |
Thermal resistance junction-ambient |
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35 |
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°C/W |
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(mounted on PCB 2s2p) |
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RthJC |
Thermal resistance junction-case |
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°C/W |
Doc ID 15153 Rev 2 |
5/21 |
Electrical characteristics |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
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Refer to the typical application circuits in Figure 3 and Figure 4, VCC1 = 16 V,
VCC2 = 23 V (1), EN/VSEL = LOW, TEN = LLC = LOW, EXTM = FLOATING, IOUT = 50 mA, TJ = 0 °C to 85 °C, unless otherwise stated. Typical values are referred to TJ = 25 °C.
Table 5. |
Electrical characteristics |
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Symbol |
Parameter |
Test conditions |
Min. |
Typ. |
Max. |
Unit |
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IOUT = 500 mA, TEN=HIGH, |
15 |
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25 |
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VCC1 |
VCC supply input 1 (1) |
EN/VSEL=LOW, LLC=LOW |
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V |
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IOUT = 500 mA, TEN=HIGH, |
16 |
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25 |
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EN/VSEL=LOW, LLC= HIGH |
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IOUT = 500 mA, TONE=HIGH, |
22 |
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25 |
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VCC2 |
VCC supply input 2 (1) |
EN/VSEL=HIGH, LLC=LOW |
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V |
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IOUT = 500 mA, TONE=HIGH, |
23 |
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25 |
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EN/VSEL=HIGH, LLC= HIGH |
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IOUT = 500 mA, EN/VSEL=LOW |
12.5 |
13.25 |
14 |
V |
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IOUT = 500 mA, EN/VSEL=HIGH |
17 |
18 |
19 |
V |
VOUT |
Output voltage |
IOUT = 500 mA, EN/VSEL=LOW, |
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14.25 |
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V |
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LLC=HIGH (2) |
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IOUT = 500 mA, EN/VSEL=LLC=HIGH (2) |
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V |
V |
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Line regulation (1) |
VCC1 from 15 V to 18 V, EN/VSEL=LOW |
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40 |
mV |
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OUT |
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or HIGH |
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VOUT |
Load regulation |
VCC1 = VCC2 = 22 V, IOUT from 50 mA to |
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50 |
150 |
mV |
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500 mA, EN/VSEL=LOW or HIGH |
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IMAX |
Output current limiting |
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550 |
700 |
850 |
mA |
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FTONE |
Tone frequency |
TEN=High |
20 |
22 |
24 |
kHz |
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ATONE |
Tone amplitude |
TEN=High |
0.4 |
0.65 |
0.9 |
VPP |
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DTONE |
Tone duty cycle |
TEN=High |
40 |
50 |
60 |
% |
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t , t |
f |
Tone Rise and Fall Time |
TEN=High (3) |
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10 |
15 |
µs |
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GEXTM |
External modulation Gain |
VOUT/ VEXTM, freq. from 10 kHz to 40 |
4.5 |
5.5 |
6.5 |
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kHz |
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V |
EXTM |
External modulation input |
AC Coupling |
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400 |
mV |
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voltage |
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PP |
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ZEXTM |
External modulation |
Freq. from 10 kHz to 40 kHz |
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Ω |
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impedance |
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VILT |
Control input logic LOW |
EN/VSEL |
0.8 |
1 |
1.2 |
V |
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threshold for 3-state pin |
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VIHT |
Control input logic HIGH |
EN/VSEL |
1.8 |
2 |
2.2 |
V |
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threshold for 3-state pin |
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IIHT |
3-state control pin input |
VIHT = 5 V, EN/VSEL |
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µA |
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current HIGH |
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6/21 |
Doc ID 15153 Rev 2 |
LNBP8L, LNBP9L, LNBP10L, LNBP11L |
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Electrical characteristics |
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Table 5. |
Electrical characteristics (continued) |
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Symbol |
Parameter |
Test conditions |
Min. |
Typ. |
Max. |
Unit |
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IILT |
3-state control pin input |
VILT = 0 V, EN/VSEL |
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+180 |
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µA |
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current LOW |
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VIL |
Control input logic LOW |
TEN, LLC |
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0.8 |
V |
VIH |
Control input logic HIGH |
TEN, LLC |
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2.5 |
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V |
IIH |
Control pins input current |
VIH = 5 V, TEN, LLC |
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µA |
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Output disabled EN/VSEL=High |
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2.4 |
mA |
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impedance (floating) |
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ICC |
Supply current |
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Output enabled EN/VSEL=HIGH, |
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3.7 |
6.3 |
mA |
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TEN=HIGH, IOUT = 500 mA |
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T |
Dynamic overload |
Output shorted, C |
EXT |
= 4.7 µF (2) |
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protection OFF time |
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OFF |
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T |
Dynamic overload |
Output shorted, C |
EXT |
= 4.7 µF (2) |
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TOFF |
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ON |
protection ON time |
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IOBK |
Output backward current |
Output forced to 21 V |
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6 |
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mA |
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TSHDN |
Thermal shutdown |
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165 |
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°C |
threshold |
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TSHDN |
Thermal shutdown |
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25 |
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°C |
hysteresis |
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1.For IPPAK package VCC1 and VCC2 are internally connected to the pin 1 (VCC) to be supplied in the range from 22 V up to 25 V
2.Only DFN package
3.Guaranteed by design
Doc ID 15153 Rev 2 |
7/21 |