IC manufacturers (103)
- All manufacturers
Analog Devices
Infineon Technologies
Microchip
Onsemi
Renesas
ROHM
STMicroelectronics
Texas Instruments
- 3peak incorporated (28)
- Ablic (23)
- Acco Semiconductor (1)
- Advanced Power (4)
- Allegro Microsystems (100)
- Alpha & Omega Semiconductor (37)
- AnalogySemi (3)
- AnDAPT Inc (204)
- Anpec (13)
- AXElite (2)
- Backward (6)
- Bright Power Semiconductor (1)
- Broadcom (46)
- Cambridge GaN Devices (18)
- Chipanalog Micro (10)
- Cologne Chips (1)
- Convenient Power (1)
- Dialog Semiconductor (12)
- Diodes Incorporated (259)
- Divimath (8)
- Elmos AG (1)
- EPC (140)
- e-Peas Semiconductors (1)
- Eta Solutions Co. Ltd. (9)
- GaN Systems (8)
- GaNPower (3)
- Giantec (1)
- Gstek Wuxi (1)
- Helix Semiconductor (7)
- IKON (1)
- Indie Semiconductor (8)
- Innovision Semiconductor Inc (2)
- Intel (68)
- Inventchip Technology (3)
- ISSI (51)
- JoulWatt (20)
- KDPOF (3)
- Kinetic Technology (8)
- Lattice semiconductor Corporation (38)
- Littelfuse (1)
- Lumissil Microsystems (8)
- M3 Technology (M3Tek) (7)
- Macnica (22)
- Marvell Semiconductor (1)
- MaxLinear (181)
- Menlo Micro (1)
- MikroE (25)
- MindCet (2)
- Monolithic Power Systems (980)
- Navitas Semiconductor Inc (6)
- NewEdge Technologies, Inc. (1)
- Nexperia (267)
- Nisshinbo Micro Device Inc. (10)
- Novosense Micro (1)
- NXP (337)
- O2 Micro International Ltd (10)
- On Bright (7)
- Panasonic (2)
- PN Junction Semiconductor (2)
- Power Integrations (117)
- Powermat (1)
- Pulsiv (19)
- Qorvo (97)
- Realsil SuRealsil(tek) Microelectronics (1)
- Richtek (297)
- Sanken Electric Co., Ltd. (16)
- Sckipio (6)
- Semtech (86)
- SG-Micro (58)
- SiFive (2)
- Silanna Semiconductor (9)
- Silergy Corporation (33)
- Silicon Laboratory Inc. (108)
- Silicontent Technology (59)
- Silvertel (59)
- Skycore Semiconductors (1)
- Skyworks (33)
- Southchip (14)
- Summit Wireless (1)
- Tagore Tech (7)
- Taiwan Semiconductor (1)
- TDK Corporation (1)
- Tempo Semiconductor (1)
- Torex (37)
- Toshiba (25)
- Transphorm (21)
- TransSIP (2)
- Union (21)
- uPI Semiconductor (2)
- Valens Semiconductor (31)
- Wise Integration (3)
- Wolfspeed (23)
- Xilinx (22)
- XL Semiconductor (3)
- XYSemi (62)
Analog Devices LTC7899 | Demoboard EVAL-LTC7899-AZ
High Voltage Synchronous Negative to Positive Converter
Overview
| Topology | Boost Converter |
| Input voltage | -54 - -32 V |
| Switching frequency | 150-180 kHz |
| Output 1 | 48 V / 8.8 A |
Description
The evaluation circuit EVAL-LTC7899-AZ features the LTC®7899: a 140V Low IQ, synchronous, negative input to positive output controller with programmable 5V to 10V gate drive. Split gate drivers allow for easily adjustable turn-on and turn-off of FETs. User adjustable adaptive and set dead time control modes are available for optimal gate timing. Additionally, the IC features low IQ, up to 2.5MHz programmable/synchronizable switching frequency, spread spectrum, in a small 28-lead (4mm x 5mm) QFN package. These features allow for a wide variety of applications including industrial, military, and telecommunications systems.The EVAL-LTC7899-AZ operates from a -32V to -54V input voltage range and generates a positive 48V output, up to 8.8A load current. The EVAL-LTC7899-AZ is set to a 150kHz switching frequency, which results in up to 97.3% peak efficiency.The LTC7899 supports a wide input and output voltage range (|VIN- |+VOUT) up to 135V. The evaluation circuit has been designed with 120V FETs, various FETs of similar footprint can be substituted to fit a wide array of applications.The EVAL-LTC7899-AZ provides a high-performance, cost-effective solution for generating a positive 48V output from a negative input. The LTC7899 data sheet gives a complete description of this part, its operation, and application information. The data sheet must be read in conjunction with this user guide for EVAL-LTC7899-AZ. Design files for this circuit board are available at www.analog.com.
Features
Converts Negative Input to Positive Output Regulated with Respect to GroundWide |VIN |+VOUT Range: 4V to 135V (140V ABS MAX)Internal Feedback Level Shifter for Easy Output Voltage Programming with Two ResistorsAdjustable Gate Drive Level: 5V to 10V (OPTI-DRIVE, 14V ABS MAX)Adjustable Driver Voltage UVLOAdaptive or Resistor-Adjustable Dead TimesSplit-Output Gate Drivers for Adjustable Turn-On and Turn-Off Driver StrengthsSupports Positive Input to Positive Output Boost Up to 135V with Pass-ThroughOperation Down to 1V after Start-UpCLK Output for High Power PolyPhase OperationSpread Spectrum Frequency ModulationProgrammable Frequency (100kHz to 2.5MHz)Phase-Lockable Frequency (100kHz to 2.5MHz)28-Pin (4mm x 5mm) QFN Package
Typical applications
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Wire Type | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 15 µH, 34.95 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance15 µH | Performance Rated Current34.95 A | Saturation Current @ 10%22 A | Saturation Current @ 30%26 A | DC Resistance2.64 mΩ | Self Resonant Frequency11 MHz | Wire TypeFlat | Pins2 | – | MountSMT | Length27 mm | Height18.5 mm | Rated Current35 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | Pins2 | – | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | Pins3 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | Pins6 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |