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Analog Devices Inc./Maxim Integrated MAX16832CASA+T
- Part No.:
- MAX16832CASA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MAX16832CASA+T.pdf
- Description:
- IC LED DRV RGLTR PWM 700MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,503
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Product details
Overview
MAX16832CASA+T from Maxim Integrated is a step-down constant-current high-brightness LED driver with integrated 65V/0.45Ω MOSFET, high-side current sensing, ±3% LED current accuracy, and 2MHz hysteretic switching. It operates from +6.5V to +65V input and delivers up to 700mA at +125°C ambient, targeting automotive RCL/DRL/fog lights and industrial ambient lighting.
For engineers reviewing the MAX16832CASA+T datasheet, MAX16832CASA+T pinout, MAX16832CASA+T application, or MAX16832CASA+T equivalent, key selection factors include its 200mV current-sense reference, thermal-foldback via TEMP_I, PWM/analog dimming support, and SO-EP package thermal performance (θJA = 53°C/W).
Technical Context
The MAX16832CASA+T uses hysteretic control with programmable current thresholds (VSNSHI = 218–236mV, VSNSLO = 166–180mV) to regulate LED current without external compensation. Its integrated 65V nMOS switch enables buck topology operation with minimal external components.
Thermal management integrates dual protection: analog thermal-foldback triggered by NTC voltage at TEMP_I (VTFB_ON = 1.9–2.12V, FBSLOPE = 0.75/V), and thermal shutdown at +165°C with 10°C hysteresis. DIM input accepts logic-level PWM (VIH ≥ 2.8V, VIL ≤ 0.6V) for wide-range brightness control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +6.5V to +65V - supports wide-input automotive and industrial DC supplies without pre-regulation. |
| Max Output Current | 700mA at TA = +125°C - defines maximum continuous LED drive capability under full automotive temperature range. |
| Current Sense Accuracy | ±3% - achieved using internal 200mV reference and 1% external RSENSE, enabling precise LED brightness control. |
| Switching Frequency | Up to 2MHz - allows use of compact 220µH inductors and reduces EMI filter size. |
| Integrated MOSFET | 65V VDS, 0.45Ω RDSON (typ) at VIN = 24V - eliminates need for external high-voltage switch and reduces BOM count. |
| Thermal Foldback | Enabled via TEMP_I pin with 25µA bias current - provides analog current reduction proportional to NTC voltage drop, preventing LED overheating. |
| Package Thermal Resistance | θJA = 53°C/W (SO-EP) - enables reliable 700mA operation at +125°C ambient with proper PCB copper area and vias. |
Pinout & Package
MAX16832CASA+T is housed in an 8-pin SO-EP (Small Outline–Exposed Pad) package with thermally enhanced construction. The exposed pad (EP) must be soldered to a large-area ground plane with multiple vias for effective power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | High-side current-sense input | Connects to sense resistor between IN and CS; sets LED current via internal comparator thresholds. |
| IN | Positive supply input | Accepts +6.5V to +65V; requires ≥1µF bypass capacitor to GND for stability. |
| GND | Analog ground reference | Reference for internal circuitry; separate from PGND to minimize noise coupling into current sense path. |
| PGND | Power ground return | Return path for LX switch current; must be routed separately from GND to avoid ground bounce. |
| LX (pins 5,6) | Switching node | Drives external inductor; connects to source of internal MOSFET and cathode of freewheeling diode. |
| DIM | PWM dimming control | Logic-level input: <0.6V disables LED current, >2.8V enables regulation; supports up to 20kHz PWM. |
| TEMP_I | Thermal foldback & analog dimming | Sources 25µA for NTC bias; voltage below 2.0V reduces LED current linearly per FBSLOPE = 0.75/V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 65V, 0.45Ω MOSFET | Reduces external component count and PCB footprint while supporting high-input automotive systems. |
| Hysteretic 2MHz switching | Eliminates need for loop compensation and enables fast transient response during PWM dimming. |
| ±3% LED current accuracy | Ensures consistent luminance across production units and temperature, critical for automotive lighting compliance. |
| High-side current sensing | Allows ground-referenced LED string placement, simplifying thermal design and eliminating low-side current sense shunt losses. |
| Thermal-foldback with NTC interface | Provides analog current derating based on LED junction temperature, extending lifetime without discrete monitoring ICs. |
Applications
| Automotive RCL/DRL | Industrial Ambient Lighting |
|---|---|
Use Scenario: Rear combination lamps and daytime running lights in 12V/24V/48V vehicle electrical systems. IC Role / Device Role / Timing Role: Constant-current buck LED driver with thermal-foldback and PWM dimming for AEC-Q100-compliant illumination. Use Value: Delivers stable 700mA output across -40°C to +125°C ambient, meeting automotive photometric consistency requirements. | Use Scenario: High-efficiency architectural and warehouse lighting powered from 24–60V DC distribution rails. IC Role / Device Role / Timing Role: Primary LED current regulator in multi-string drivers with analog dimming for smooth light-level transitions. Use Value: ±3% current accuracy ensures uniform brightness across long LED strings without per-string calibration. |
| Heads-Up Display (HUD) Backlight | Indicator & Emergency Lighting |
Use Scenario: Compact, thermally constrained HUD projector backlight requiring precise current control and low EMI. IC Role / Device Role / Timing Role: High-frequency (2MHz) buck controller minimizing inductor size while maintaining tight current regulation. Use Value: Small 220µH inductor enabled by 2MHz operation reduces volume by >40% vs. 500kHz alternatives. | Use Scenario: Safety-critical panel indicators and emergency exit signs operating from wide-input industrial DC supplies. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with thermal shutdown (+165°C) and undervoltage lockout (6.0–6.5V). Use Value: Dual protection prevents thermal runaway and ensures fail-safe operation during brownout conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832AASA+T | Lower current ripple (10% vs. 30%), tighter VSNSHI/VSNSLO thresholds (197–213mV / 185–198mV), same package and pinout. | Better suited for low-noise, high-precision applications where ripple-induced EMI or flicker must be minimized. | Select MAX16832AASA+T when ±1% current ripple is required; MAX16832CASA+T offers higher efficiency at light loads due to relaxed hysteresis. |
| LM3409HVMM/NOPB | External MOSFET required, no integrated thermal-foldback, 1.25V current-sense threshold, max 1MHz switching. | Requires additional components for thermal protection and higher-current designs; lacks analog dimming via TEMP_I. | Choose LM3409HVMM/NOPB only if external MOSFET flexibility is needed; MAX16832CASA+T provides higher integration and smaller solution size. |
Compared with MAX16832AASA+T, the MAX16832CASA+T trades tighter current regulation for improved light-load efficiency and relaxed hysteresis margins; versus LM3409HVMM/NOPB, it delivers full integration including MOSFET, thermal-foldback, and 2MHz operation-reducing total BOM count by ≥4 components.
Availability
MAX16832CASA+T is available at Aetrix Electronics and suitable for automotive lighting, industrial ambient lighting, and indicator/emergency lighting requiring stable component supply, AEC-Q100-aligned thermal performance, and long-term production continuity.
Supply support for MAX16832CASA+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX16832 family targets cost-sensitive, high-reliability LED lighting systems requiring wide-input operation, integrated power switches, and robust thermal management-designed specifically for automotive exterior/interior and industrial solid-state lighting.
FAQ
What is the maximum continuous LED current supported by the MAX16832CASA+T at +125°C ambient?
The MAX16832CASA+T supports up to 700mA continuous LED current when operated at an ambient temperature of +125°C. This rating is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet. Operation above this current at +125°C requires derating or forced cooling. The MAX16832CASA+T achieves this with its integrated 0.45Ω MOSFET and SO-EP thermal design (θJA = 53°C/W).
Does the MAX16832CASA+T support both PWM and analog dimming simultaneously?
No, the MAX16832CASA+T does not support simultaneous PWM and analog dimming. PWM dimming is controlled via the DIM pin (logic-level input), while analog dimming is implemented through the TEMP_I pin using either an external DC voltage or NTC thermistor. Applying both signals concurrently causes undefined behavior because TEMP_I's analog function overrides current regulation independently of DIM state. The MAX16832CASA+T is designed for exclusive use of one dimming method per application.
What is the purpose of the separate GND and PGND pins on the MAX16832CASA+T?
The MAX16832CASA+T separates analog ground (GND) and power ground (PGND) to prevent switching noise from the LX node and high-current paths from corrupting the precision current-sense measurement at the CS pin. GND serves as the reference for internal comparators and bias circuits, while PGND carries pulsed inductor return current. Routing these grounds separately-then joining them at a single point near the input capacitor-maintains ±3% LED current accuracy. This separation is essential for stable hysteretic regulation in the MAX16832CASA+T.
Can the MAX16832CASA+T drive multiple LED strings in parallel?
No, the MAX16832CASA+T is designed to drive a single LED string in series configuration. Its high-side current-sense architecture regulates total string current, not per-string current. Driving parallel strings without individual current regulation leads to thermal runaway and mismatched brightness due to Vf variations. For multi-string applications, separate MAX16832CASA+T channels or a matrix driver IC with per-string sensing is required. The MAX16832CASA+T datasheet specifies operation with "HB LEDs" as a single string in all typical application circuits.
What is the recommended minimum value for the current-sense resistor (RSENSE) in the MAX16832CASA+T application?
The recommended minimum RSENSE value for the MAX16832CASA+T is determined by the maximum expected LED current and the VSNSHI threshold (218–236mV). For 700mA operation, RSENSE ≥ (VSNSLO / ILED) ≈ 166mV / 0.7A = 0.237Ω; standard 0.25Ω or 0.3Ω 1% resistors are commonly used. Lower values risk violating the ±3% accuracy spec due to comparator offset and noise sensitivity. The MAX16832CASA+T datasheet explicitly warns against RSENSE < 0.2Ω to maintain regulation integrity and thermal stability.
MAX16832CASA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 65V
- Voltage - Output:
- -
- Current - Output / Channel:
- 700mA
- Frequency:
- 2MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MAX16832CASA+T FAQ
1.How can I place an order for MAX16832CASA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16832CASA+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX16832CASA+T reliable?
The price and inventory of MAX16832CASA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16832CASA+T is usually 5 days.
3.What payment methods are accepted for MAX16832CASA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16832CASA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16832CASA+T?
MAX16832CASA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16832CASA+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX16832CASA+T?
For technical support, including MAX16832CASA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16832CASA+T requirements.
6.How does Aetrix verify that MAX16832CASA+T is sourced from the original manufacturer or authorized distributors?
All MAX16832CASA+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX16832CASA+T meets industry standards.
7.What is the process for return or replacement of MAX16832CASA+T?
All MAX16832CASA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16832CASA+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX16832CASA+T part is unused and in its original packaging.
Return procedure for MAX16832CASA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX16832CASA+T Tags
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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