Multiphase Bidirectional Current Controller
Product details
Parameters
Package | Pins | Size
Features
- AEC-Q100 qualified for automotive applications:
- Device temperature grade 1: –40°C to +125°C ambient operating range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- Functional Safety-Capable
- 100-V HV-port and 65-V LV-port max ratings
- 1% Accurate bidirectional current regulation
- 1% Accurate channel current monitoring
- 5-A Peak half-bridge gate drivers
- Programmable or adaptive dead-time control
- Programmable oscillator frequency with optional synchronization to external clock
- Independent channel enable control inputs
- Analog and digital channel current control inputs
- Programmable cycle-by-cycle peak current limit
- HV and LV port overvoltage protection
- Diode emulation prevents negative current
- Programmable soft-start timer
- MOSFET failure detect at start-up and circuit breaker control
- Multiphase operation phase adding or dropping
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Description
The LM5170-Q1 controller provides the essential high voltage and precision elements of a dual-channel bidirectional converter for automotive 48-V and 12-V dual battery systems. It regulates the average current flowing between the high voltage and low voltage ports in the direction designated by the DIR input signal. The current regulation level is programmed through analog or digital PWM inputs.
Dual-channel differential current sense amplifiers and dedicated channel current monitors achieve typical current accuracy of 1%. Robust 5-A half-bridge gate drivers are capable of driving parallel MOSFET switches delivering 500 W or more per channel. The diode emulation mode of the synchronous rectifiers prevents negative currents but also enables discontinuous mode operation for improved efficiency with light loads. Versatile protection features include cycle-by-cycle current limiting, overvoltage protection at both HV and LV ports, MOSFET failure detection and overtemperature protection.
An innovative average current mode control scheme maintains constant loop gain allowing a single R-C network to compensate both buck and boost conversion. The oscillator is adjustable up to 500 kHz and can synchronize to an external clock. Multiphase parallel operation is achieved by connecting two LM5170-Q1 controllers for 3- or 4-phase operation, or by synchronizing multiple controllers to phase-shifted clocks for a higher number of phases. A low state on the UVLO pin disables the LM5170-Q1 in a low current shutdown mode.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM5170-Q1 Multiphase Bidirectional Current Controller datasheet (Rev. C) | Jun. 10, 2020 |
Functional safety information | LM5170 and LM5170-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution | May 22, 2020 | |
Application note | Why use PSR‐flyback isolated converters in dual‐battery mHEV systems | Mar. 19, 2020 | |
Technical articles | Taking a modular approach to high-precision, high-current battery test equipment | Jun. 21, 2019 | |
Technical articles | Four-switch buck-boost layout tip No. 4: routing gate-drive and return paths | Feb. 20, 2019 | |
White paper | Bridging 12 V and 48 V in dual-battery automotive systems | Oct. 18, 2018 | |
Technical articles | Achieving highly accurate full-scale charge and discharge current control for high-cell Li-ion battery-formation testing | Aug. 13, 2018 | |
Technical articles | How to charge and discharge battery test equipment | Apr. 11, 2018 | |
User guide | LM5170-Q1 EVM User's Guide (Rev. A) | Dec. 05, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Buck Mode: 48V-port voltage range 6V to 75V; 12V-port voltge regulated at 14.5V
- Boost Mode: 12V-port voltage range 3V to 48V; 48V-port voltge regulated at 50.5V
- Max dc current into or out of the 12V-port is 60A
- Built-in analog voltage loop control, while it also accept MCU digital voltage loop control (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
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download PMP22396 BOM.pdf (350KB) -
download PMP22396 Assembly Drawing.pdf (563KB) -
download PMP22396 PCB.pdf (4838KB) -
download PMP22396 CAD Files.zip (4669KB) -
download PMP22396 Gerber.zip (1204KB)
Design files
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download TIDA-01168 BOM.pdf (51KB) -
download TIDA-01168 Assembly Drawing.pdf (787KB) -
download TIDA-01168 PCB.pdf (4091KB) -
download TIDA-01168 CAD Files.zip (4016KB) -
download TIDA-01168 Gerber.zip (642KB) -
download TIDA-01168 Busbars CNC Data (Mechanical).zip (25KB) -
download TIDA-01168 Heatsink Drilling Plan (Mechanical).zip (34KB) -
download TIDA-01168 Heatsink Drilling Plan.pdf (42KB)
Design files
-
download PMP21943 BOM.pdf (108KB) -
download PMP21943 Assembly Drawing.pdf (337KB) -
download PMP21943 PCB.pdf (3066KB) -
download PMP21943 CAD Files.zip (2693KB) -
download PMP21943 Gerber.zip (761KB)
Design files
-
download PMP21867 BOM.pdf (107KB) -
download PMP21867 Assembly Drawing.pdf (312KB) -
download PMP21867 PCB.pdf (3459KB) -
download PMP21867 CAD Files.zip (2513KB) -
download PMP21867 Gerber.zip (897KB)
Design files
-
download TIDA-01040 BOM.pdf (215KB) -
download TIDA-01040 Assembly Drawing.pdf (431KB) -
download TIDA-01040 PCB.pdf (5830KB) -
download TIDA-01040 CAD Files.zip (4178KB) -
download TIDA-01040 Gerber.zip (1352KB)
Design files
-
download TIDA-01041 BOM.pdf (213KB) -
download TIDA-01041 Assembly Drawing.pdf (497KB) -
download TIDA-01041 PCB.pdf (7425KB) -
download TIDA-01041 CAD Files.zip (24839KB) -
download TIDA-01041 Gerber.zip (1347KB)
Design files
-
download TIDA-01042 BOM.pdf (241KB) -
download TIDA-01042 Assembly Drawing.pdf (528KB) -
download TIDA-01042 PCB.pdf (7810KB) -
download TIDA-01042 CAD Files.zip (5259KB) -
download TIDA-01042 Gerber.zip (1270KB)
Design files
-
download PMP15035 BOM.pdf (308KB) -
download PMP15035 Assembly Drawing.pdf (482KB) -
download PMP15035 PCB.pdf (4190KB) -
download PMP15035 CAD Files.zip (6127KB) -
download PMP15035 Gerber.zip (1836KB)
Design files
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download PMP15038 BOM.pdf (31KB) -
download PMP15038 Assembly Drawing.pdf (126KB) -
download PMP15038 PCB.pdf (472KB) -
download PMP15038 CAD Files.zip (465KB) -
download PMP15038 Gerber.zip (248KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTQFP (PHP) | 48 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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