ST LNBP8L, LNBP9L, LNBP10L, LNBP11L User Manual

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
	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

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Contents	LNBP8L, LNBP9L, LNBP10L, LNBP11L

Contents

1	Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 3
2	Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4
3	Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5
4	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
5	Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
6	Detailed description and application hints . . . . . . . . . . . . . . . . . . . . . . .		9
	6.1	Input voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	6.2	Single supply for the DFN package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
	6.3	IPPAK mounting and thermal considerations . . . . . . . . . . . . . . . . . . . . . .	11
7	Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
8	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		16
9	Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		19
10	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		20

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LNBP8L, LNBP9L, LNBP10L, LNBP11L	Diagram

1 Diagram

Figure 1. Block diagram

	VCC1
	VCC2
		RSENSE
	EN/VSEL	TRISTATE ENABLE &
		VOUT SELECTION
	LLC	VOLTAGE
		REFERENCE
		OUTPUT
	CEXT	DYNAMIC
		CURRENT LIMIT

THERMAL

PROTECTION

TEN	22kKHz	EXTM
	OSCILLATOR

LNBP8L/9L/10L/11L

GND

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Pin configuration	LNBP8L, LNBP9L, LNBP10L, LNBP11L

2 Pin configuration

Figure 2. Pin connections (top view for IPPAK, bottom view for DFN8)

IPPAK

DFN8 (5 x 6 mm)

Table 1.	Pin description
Pin n° (DFN)		Pin n°
		(IPPAK)	Name					Pin function
LNBP10/11L
		LNBP8/9L
			VCC1	Supply input 1: 15 V to 25 V supply. For DFN package it is
				automatically selected when VOUT = 13 V. For IPPAK package
1		-	(not available for
				V	CC1	and V	CC2	are internally connected together to pin 1 to be
			IPPAK)
				supplied at 22 V min.
			VCC2	Supply input 2: 22 V to 25 V supply. For DFN package it is
				automatically selected when VOUT = 18 V. For IPPAK package
2		1	(VCC pin for
				VCC1 and VCC2 are internally connected together to the pin 1 to be
			IPPAK)
				supplied at 22 V min.
3		2	OUTPUT	Output: regulator output. It is 13 V typ when EN/VSEL LOW and
				18 V typ when EN/VSEL HIGH.
4, ePAD		3, ePAD	GROUND	GROUND
				Enable and output voltage selection 3-state pin: logic control
6		4	EN/VSEL	input 3-state pin for the remote controlling of the LNB; if LOW
				VOUT = 13 V, when HIGH VOUT = 18 V, if left at high impedance the
				IC is set in shut down mode (VOUT = 0 V)
				Tone enable (LNBP9-11): logic control input to enable internal
5		5	EXTM/TEN	tone generator.
				External modulation (LNBP8-10): Needs DC decoupling to the
				AC source. If not used can be left floating.
8		NA	LLC	LLC: logic control input to add 1 V typ.
7		NA	CEXT	CEXT: timing capacitor used by the dynamic overload protection.
				Typical application is 4.7 µF for a 1100 ms cycle

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LNBP8L, LNBP9L, LNBP10L, LNBP11L			Maximum ratings
3	Maximum ratings
Table 2.	Absolute maximum ratings
Symbol		Parameter	Value	Unit
VCC1, VCC2		Input voltages	-0.3 to 28	V
VCC1-OUTPUT		VCC1 voltage with respect to OUTPUT voltage (1)	-0.3 to 25	V
VCC2-OUTPUT		VCC2 voltage with respect to OUTPUT voltage (1)	-0.3 to 25	V
EN/VSEL, TEN,		Logic input voltage	-0.3 to 7	V
LLC
EXTM		External modulation input voltage	-0.3 to 1	V
OUTPUT		Output voltage	-0.3 to 25	V
TSTG		Storage temperature range	-50 to 150	°C
ESD		ESD rating with human body model (HBM) for all pins except 1, 2, 6	2	kV
DFN package		ESD rating with human body model (HBM) for pins 1, 2, 6	1.5
ESD		ESD rating with human body model (HBM) for all pins except 1, 4	2	kV
IPPAK package		ESD rating with human body model (HBM) for pins 1, 4	1.5

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:		Absolute maximum ratings are those values beyond which damage to the device may occur.
		These are stress ratings only and functional operation of the device at these conditions is
		not implied. Exposure to absolute-maximum-rated conditions for extended periods may
		affect device reliability. All voltage values are with respect to network ground terminal unless
		otherwise stated.
Table 3.		Operating ratings
Symbol			Parameter				Value		Unit
TJ			Operating junction temperature range				0 to 125		°C
VCC1			Input voltage				15 to 25		V
VCC2			Input voltage				22 to 25		V
Table 4.		Thermal data
Symbol			Parameter		IPPAK	DFN8			Unit
RthJA	Thermal resistance junction-ambient					35			°C/W
						(mounted on PCB 2s2p)
RthJC	Thermal resistance junction-case				8				°C/W

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Electrical characteristics	LNBP8L, LNBP9L, LNBP10L, LNBP11L

4 Electrical characteristics

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
Symbol			Parameter	Test conditions	Min.	Typ.	Max.	Unit
				IOUT = 500 mA, TEN=HIGH,	15		25
VCC1			VCC supply input 1 (1)	EN/VSEL=LOW, LLC=LOW				V
				IOUT = 500 mA, TEN=HIGH,	16		25
				EN/VSEL=LOW, LLC= HIGH
				IOUT = 500 mA, TONE=HIGH,	22		25
VCC2			VCC supply input 2 (1)	EN/VSEL=HIGH, LLC=LOW				V
				IOUT = 500 mA, TONE=HIGH,	23		25
				EN/VSEL=HIGH, LLC= HIGH
				IOUT = 500 mA, EN/VSEL=LOW	12.5	13.25	14	V
				IOUT = 500 mA, EN/VSEL=HIGH	17	18	19	V
VOUT			Output voltage	IOUT = 500 mA, EN/VSEL=LOW,		14.25		V
				LLC=HIGH (2)
				IOUT = 500 mA, EN/VSEL=LLC=HIGH (2)		19		V
V			Line regulation (1)	VCC1 from 15 V to 18 V, EN/VSEL=LOW		5	40	mV
	OUT			or HIGH
VOUT			Load regulation	VCC1 = VCC2 = 22 V, IOUT from 50 mA to		50	150	mV
				500 mA, EN/VSEL=LOW or HIGH
IMAX			Output current limiting		550	700	850	mA
FTONE			Tone frequency	TEN=High	20	22	24	kHz
ATONE			Tone amplitude	TEN=High	0.4	0.65	0.9	VPP
DTONE			Tone duty cycle	TEN=High	40	50	60	%
	t , t	f	Tone Rise and Fall Time	TEN=High (3)	5	10	15	µs
	r
GEXTM			External modulation Gain	VOUT/ VEXTM, freq. from 10 kHz to 40	4.5	5.5	6.5
				kHz
V	EXTM		External modulation input	AC Coupling			400	mV
			voltage					PP
ZEXTM			External modulation	Freq. from 10 kHz to 40 kHz		400		Ω
			impedance
VILT			Control input logic LOW	EN/VSEL	0.8	1	1.2	V
			threshold for 3-state pin
VIHT			Control input logic HIGH	EN/VSEL	1.8	2	2.2	V
			threshold for 3-state pin
	IIHT		3-state control pin input	VIHT = 5 V, EN/VSEL		-400		µA
			current HIGH

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LNBP8L, LNBP9L, LNBP10L, LNBP11L					Electrical characteristics
Table 5.	Electrical characteristics (continued)
Symbol	Parameter	Test conditions			Min.	Typ.	Max.	Unit
IILT	3-state control pin input	VILT = 0 V, EN/VSEL				+180		µA
	current LOW
VIL	Control input logic LOW	TEN, LLC					0.8	V
VIH	Control input logic HIGH	TEN, LLC			2.5			V
IIH	Control pins input current	VIH = 5 V, TEN, LLC				20		µA
		Output disabled EN/VSEL=High				1.7	2.4	mA
		impedance (floating)
ICC	Supply current
		Output enabled EN/VSEL=HIGH,				3.7	6.3	mA
		TEN=HIGH, IOUT = 500 mA
T	Dynamic overload	Output shorted, C	EXT	= 4.7 µF (2)		1000		ms
	protection OFF time
OFF
T	Dynamic overload	Output shorted, C	EXT	= 4.7 µF (2)		TOFF		ms
ON	protection ON time					/12
IOBK	Output backward current	Output forced to 21 V				6		mA
TSHDN	Thermal shutdown					165		°C
	threshold
TSHDN	Thermal shutdown					25		°C
	hysteresis

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

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