SI9160 Vishay Semiconductors, SI9160 Datasheet

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SI9160

Manufacturer Part Number
SI9160
Description
Manufacturer
Vishay Semiconductors
Datasheet

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DESCRIPTION
The Si9160 Controller for RF Power Amplifier Boost Converter
is a fixed-frequency, pulse-width-modulated power conversion
controller designed for use with the Si6801 application specific
MOSFET. The Si9160 and the Si6801 are optimized for high
efficiency switched-mode power conversion at 1 MHz and
over. The device has an enable pin which can be used to put
the converter in a low-current mode compatible with the
standby mode of most cellular phones. A wide bandwidth
feedback amplifier minimizes transient response time allowing
the device to meet the instantaneous current demands of
today’s
accommodates minimal size and cost battery pack
configurations.
Frequency control in switching is important to noise
management techniques in RF communications. The Si9160
is easily synchronized for high efficiency power conversion at
frequencies in excess of 1 MHz.
Document Number: 70029
S-40700—Rev. H, 19-Apr-04
FEATURES
D High Frequency Switching (up to 2 MHz)
D Optimized Output Drive Current (350 mA)
D Standby Mode
APPLICATION CIRCUIT
0.1 mF
digital
0.1 mF
2.2 k
1 Cell
LiIon
0.1 mF
Controller for RF Power Amplifier Boost Converter
protocols.
100 k
20 mF
10 k
The
N/C
FB
V
D
COMP
NI
V
GND
DD
REF
MAX
Si9160
input
UVLO
ENABLE
PGND
C
C
R
OSC
OSC
OSC
SET
D
V
D
voltage
LS4148
R
S
S
To Power
Management
range
56 pF
0.1 mF
4.7 mH
12 k
D Wide Bandwidth Feedback Amplifier
D Single-Cell LiIon and Three-cell NiCd or NiMH Operation
Optimizing the controller and the synchronous FETs results in
the highest conversion efficiency over a wide load range at the
switching frequencies of interest (1 MHz or greater). It also
minimizes the overshoot and gate ringing associated with
drive current and gate charge mismatches.
When disabled, the converter requires less than 330 mA. This
capability minimizes the impact of the converter on battery life
when the phone is in the standby mode.
Finally, operating voltage is optimized for LiIon battery
operation (2.7 V to 4.5 V) and can also be used with three-cell
NiCd or NiMH (3 V to 3.6 V), as well as four-cell NiCd or NiMH
(4 V to 4.8 V) battery packs.
The Si9160 is available in both standard and lead (Pb)-free
packages.
1
2
3
4
D
S
S
G
1
1
1
1
Si6801
G
D
S
S
5600 pF
2
2
2
2
100 W
8
7
6
5
LS4148
Vishay Siliconix
3.6 k
1.2 k
20 mF
6 V @ 500 mA
www.vishay.com
Si9160
1

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SI9160 Summary of contents

Page 1

... Finally, operating voltage is optimized for LiIon battery operation (2 4.5 V) and can also be used with three-cell NiCd or NiMH ( 3.6 V), as well as four-cell NiCd or NiMH ( 4.8 V) battery packs. The Si9160 is available in both standard and lead (Pb)-free packages. 4 LS4148 ...

Page 2

... Si9160 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND GND Linear Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Peak Output Drive Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . * . Exposure to Absolute Maximum rating conditions for extended periods may affect device reliability. Stresses above Absolute Maximum rating may cause permanent damage ...

Page 3

... V 1.4 DD 0 −1.0 80 −100 V = 2 4.5 V 1.6 DD 250 V vs. Temperature REF 1.515 1.510 1.505 1.500 1.495 1.490 1.485 −40 − − Temperature (_C) Si9160 b Unit V V 0.15 −250 1 100 nA 1 2.3 330 mA 80 100 www.vishay.com 3 ...

Page 4

... Si9160 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS OTHERWISE NOTED) V vs. Load Current REF 1.502 1.501 2.7 V 1.500 1.499 1.498 6.0 V 1.497 − Sourcing Current (mA) REF Supply Current vs. Supply Voltage and Temperature 1000 pF −25_C 7.0 kW OSC 100 pF OSC ...

Page 5

... Document Number: 70029 S-40700—Rev. H, 19-Apr-04 10.00 1.00 0.10 0. Duty Cycle vs. D MAX 5 500 kHz 0.8 0.9 1.0 1.1 1.2 1.3 1.4 D (V) MAX Vishay Siliconix Frequency vs OSC OSC 4.98 kW 12.07 kW 24.88 kW 49.7 kW 100.4 kW 248 100 200 C − Capacitance (pF) OSC 1 MHz 1.5 MHz 1.5 1.6 Si9160 300 400 www.vishay.com 5 ...

Page 6

... REF 9 GND 8 ENABLE Top View Order Number: Si9160BQ-T1 PIN DESCRIPTION Pin The positive power supply for all functional blocks except output driver. A bypass capacitor of 0.1 mF (minimum) is recommended. Pin 2: N/C There is no internal connection to this pin. Pin 3: D MAX Used to set the maximum duty cycle. ...

Page 7

... ENABLE 1 MAX V COSC BBM Document Number: 70029 S-40700—Rev. H, 19-Apr-04 V REF 1.5-V Reference Generator V UVLO + − − Logic and BBM Control Oscillator Si9160 Vishay Siliconix V REF GND Driver GND P GND V S Driver GND www.vishay.com 7 ...

Page 8

... Startup Designed to operate with single cell Lithium Ion battery voltage, the Si9160 has an operating range of 2 6.0 V. During start-up, the device requires 3 guarantee proper operation, although it will typically start up at less than 2.2 V. Once powered, Si9160 will continue to operate until the voltage at V dead ...

Page 9

... The 5 ns/DIV, 2 V/DIV Note the Speed These MOSFETs have switching speeds of <5 ns. This high speed is due to the fast, high current output drive of the Si9160 and the opti- mized gate charge of the Si6801. FIGURE 3. Gate Switching Times Stability Components A voltage mode boost converter is normally stabilized with ...

Page 10

... Figure function of input voltage. Designed with small surface mount inductors and capacitors, the Si9160 solution can fit easily within a small space such as a battery pack. Another distinct advantage of a smaller converter size is that it reduces the noise generating area by ...

Page 11

... Output Current (A) FIGURE 6. Efficiency of Si9160 and Si6801 Boost converter at various fixed frequencies <1 mV Noise Floor 1 kHz FIGURE 8. Spectrum response for the Si9160 demo board output voltage <1 mV Noise Floor 1 MHz Conclusion Switching at high, known frequencies results in a smaller footprint while maintaining high efficiency. Efficiencies at high ...

Page 12

Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description ...

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