Product overview
Description
L99MH98 is an integrated octal half-bridge pre-driver dedicated to control up to sixteen N-channel MOSFETs.
It is intended for DC motor control applications such as automotive power seat control or other applications.
A 24-bit serial peripheral interface (SPI) is used for configuring and controlling the eight half-bridges or four H‑bridge. SPI status registers provide high-level diagnostic information such as supply voltage monitoring, the charge pump voltage monitoring, temperature warning and overtemperature shutdown.
Each gate driver monitors independently its external MOSFET drain-source voltage for fault conditions.
The L99MH98 supports indirect current measurement on external MOSFETs, allowing cost saving and lower system complexity, avoiding the usage of shunt resistors.
A more efficient gate current control of the external MOSFETs, called “three stages gate current”, decreases and optimizes electromagnetic interference (EMI).
Protection features (drain-source monitoring for short circuit detection, overtemperature warning and shutdown, timeout watchdog for MCU control, detailed off-state diagnostic via SPI) ensure the ASIL-B achievement according to ISO 26262 standard.
The L99MH98 is hosted in a VFQFPN48L package with exposed pad. This package has wettable flanks for easy visual inspection of the solder joint.
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All features
- AEC-Q100 qualified
- ISO26262 compliant, covering ASIL-B safety integrity level
- Octal half-bridge, or quad H-bridge, pre-driver
- Independent channel driver up to 8 high-side or 8 low-side
- Driving logic permits any H-bridge configuration, pairing different half-bridges, using the internal gate drivers (GHx/SHx/GLx can be associated to any GHy/SHy/GLy)
- Support logic level and standard level MOSFETs
- Control of reverse battery protection MOSFET
- Fully configurable half-bridge driver in case of fault occurrence
- Generator mode for power trunk/tailgate applications
- Supporting indirect current measurement of external MOSFETs
- SPI configurable overvoltage threshold
- Adaptive MOSFET gate control
- Three steps gate control of external HS/LS
- Improved electromagnetic emission
- Programmable gate current up to 120 mA
- Reduced switching losses in PWM mode
- Vds monitoring
- Low IQ (1.05 μA) in reset mode
- High-side and low-side capable of protection and diagnosis
- Four external diodes control, needed for assisting calibration of indirect current measurement, can be used for steady - temperature monitoring
- Drain-source monitoring for short circuit detection
- Overtemperature warning and shutdown
- Timeout watchdog for MCU control
- Detailed off-state diagnostic (open load, short circuit to battery or short circuit to GND) via SPI
- Three PWM inputs
- High-side and low-side PWM capable
- Active freewheeling
- Up to 50 kHz PWM frequency
- Out-of-frame serial peripheral interface (SPI), 24 bits
- QFN package with wettable flanks
- Green product (RoHS compliant)
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| EVAL-L99MH98 | Preview | CARD | Industrial | Not compliant | |
| L99MH98-TR | Active | VFQFN 7X7X0.9 48L WETT. FLANKS | Automotive Safety | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EVAL-L99MH98 | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| L99MH98-TR | | | distributors No availability of distributors reported, please contact our sales office |
EVAL-L99MH98 Preview
L99MH98-TR Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors