Hichips Primary Agent DC to DC Buck constant current drive IC Hi7000D
- Model：
- Hi7000D
- Brand：
- Hichips
- Batch No：
- Hi7000D,智芯半导体,Hichips,共阳极LED恒流芯片,外置MOS LED驱动,舞台灯调光IC,65536级高辉调光,SOT23‑6,广晟微一级代理
- Desc：
- Hi7000D is Hichips external‑MOS average‑current common‑anode LED driver IC, 5‑100V wide input, 65536:1 high‑resolution dimming with PWM & analog dimming. GSMicro is authorized distributor, engineering samples available.
- Stock：
- 210000 只
Hi7000D Common‑Anode Buck LED Constant‑Current Driver IC | High‑Resolution Stage‑Light Dimming | Hichips | GSMicro Authorized Distributor
Overview:Hi7000D is an external‑MOS multi‑function average‑current common‑anode buck LED constant‑current driver released by Hichips. Adopting proprietary average‑current control algorithm, it achieves ≤±3% constant‑current accuracy with little influence from input‑output voltage and inductor parameters. It supports ultra‑narrow pulse‑width PWM dimming and 0.2‑1.2V analog dimming to realize 65536:1 high‑resolution dimming performance. Built‑in loop compensation reduces external components and enhances system stability, suitable for high‑power LED lighting solutions such as landscape lights, stage lights and automotive lamps. GSMicro Semiconductor acts as authorized level‑1 distributor of Hichips.
Hi7000D Product Description
Hi7000D is manufactured by Hichips, an external‑MOSFET average‑current common‑anode buck LED constant‑current driver targeting wide‑voltage non‑isolated high‑power LED driving applications. With proprietary average‑current control algorithm, output current is barely affected by input voltage, output voltage and system inductor, offering constant‑current accuracy up to ≤±3%.
Hi7000D integrates internal loop‑compensation circuit to simplify external BOM and improve system stability. Dual‑mode dimming including PWM dimming and LD analog dimming are supported. The PWM input accepts minimum 60ns ultra‑narrow pulse width for 65536 (256*256)‑level high‑resolution dimming, which perfectly meets the fine‑grayscale dimming requirements for stage and landscape luminaires.
Hi7000D integrates a 5V LDO regulator, capable of driving external 50N‑grade NMOS power MOSFET. Maximum switching frequency reaches 1 MHz. Compact SOT23‑6 surface‑mount package saves PCB layout space.
Hi7000D Key Features
Common‑anode buck constant‑current architecture for high‑power LED luminaires
Average‑current control mode, constant‑current accuracy ≤±3%
65536:1 high‑resolution dimming ratio, PWM supports minimum 60ns pulse‑width
Dual dimming modes: PWM dimming + LD analog dimming, soft‑start function available
5V‑100V ultra‑wide input voltage range
Adjustable output current: 60mA ~ 5A (depends on external MOSFET)
Built‑in 5V LDO regulator & internal loop compensation, minimal external components
Maximum operating switching frequency up to 1 MHz
SOT23‑6 compact SMD package
Hi7000D Applications
Landscape Lighting: landscape LED fixtures, wall‑washer lights, architectural lighting, Hi7000D is fully compatible
Stage Lighting: stage effect luminaires, multi‑channel RGBW stage fixtures, Hi7000D delivers smooth high‑resolution dimming
Automotive Lighting: premium automotive LED lamps
Backlight: LCD panel backlight
General‑purpose non‑isolated high‑power LED constant‑current driver modules
Hi7000D Internal Functional Block Diagram
Complete diagram available in official datasheet.
Hi7000D Typical Application Schematic
Refer to official datasheet for full circuit notes; pay attention to inductor selection and MOSFET gate‑resistor matching.
Hi7000D Pin Definition
| Pin No. | Symbol | Function Description |
|---|---|---|
| 1 | CS | Hi7000D Current‑sense input pin; external sense resistor RCS sets output current |
| 2 | GND | Hi7000D Ground reference |
| 3 | VDD | Hi7000D IC power‑supply pin, internal 5V LDO clamp |
| 4 | LD | Hi7000D Analog dimming pin; 0.2V‑1.2V analog‑dimming input; output shuts down below 0.2V; external capacitor enables soft‑start |
| 5 | PWM | Hi7000D PWM dimming pin; high‑level = enable, low‑level = shutdown; supports minimum 60ns narrow pulse‑width; floating defaults to high level |
| 6 | GATE | Hi7000D NMOS gate‑drive pin for external power MOSFET |
Hi7000D Package Outline Drawing
Hi7000D Key Electrical Specifications (T=25℃)
| Symbol | Parameter | Typical Value | Unit |
|---|---|---|---|
| VIN | Hi7000D System input voltage | 5‑100 | V |
| IOUT | Hi7000D Output‑current range (depends on external MOSFET) | 60mA‑5A | A |
| ACC | Hi7000D Constant‑current accuracy | ≤±3 | % |
| fmax | Hi7000D Maximum switching frequency | 1 | MHz |
| DR_MOS | Hi7000D Max supported MOSFET rating | 50N | ‑ |
| DIM_RATIO | Hi7000D Dimming ratio | 65536:1 | ‑ |
| VDD_CLAMP | Hi7000D VDD internal LDO clamp voltage | 5.2 | V |
| VREF_CS | Hi7000D CS current‑sense reference voltage | 0.2 | V |
Hi7000D Application Notes
Chip Power‑Up Sequence
Hi7000D charges VDD external capacitor via startup resistor after power‑on. When VDD exceeds 4.5V, the IC starts operation and VDD is clamped internally to approx.5.2V. VDD supply current is provided by external resistor R3. Adjust R3 value for different power MOSFET: larger MOSFET requires smaller R3; lower input voltage also requires smaller R3. Refer to datasheet section 9.6 for R3 reference values.
Output‑Current Setting
Hi7000D output‑current formula: Iout = 0.2V / RCS. The CS pin samples voltage across sense resistor RCS and compares against internal 0.2V reference for constant‑current regulation. Select RCS with adequate power derating according to real working current.
Dimming Configuration
Hi7000D supports LD analog dimming and PWM digital dimming. LD input of 0.2V‑1.2V enters analog‑dimming mode; output shuts down when LD voltage is below 0.2V. Adding external capacitor to LD pin implements soft‑start function. For LD‑pin PWM driving, high‑level input shall exceed 1.2V.
PWM pin accepts minimum 60ns ultra‑narrow pulse‑width input. High level = IC enable, low level = output shutdown. If LD and PWM pins are unused, tie them to VDD.
Inductor Selection Guidelines
Hi7000D switching frequency is affected by inductor value. Inductor value sets current rising/falling slope and determines practical switching frequency. The selected inductor saturation current must exceed system peak current to avoid saturation failure. DCR, MOSFET Rds(on) and freewheeling diode forward drop will influence real‑world operating frequency. Refer to datasheet for calculation formulas.
PCB Layout Recommendations
① Place CS sense resistor close to CS and GND pins to minimize trace‑induced sensing error;
② Keep GATE‑to‑MOS‑gate trace short; add gate resistor to suppress oscillation;
③ Widen high‑power loops (input, MOS, LED, freewheeling diode, inductor) to reduce power loss;
④ Place decoupling capacitor close to VDD pin; use single‑point grounding for analog‑ground and power‑ground to mitigate noise;
⑤ Ensure inductor saturation current is higher than system peak current to prevent saturation.
Hi7000D Ordering Information
| Part Number | Package | Marking | Packing |
|---|---|---|---|
| Hi7000D | SOT23‑6 | 7000D | Tape & Reel, 3000pcs/reel |
Hi7000D is supplied in moisture‑sensitive tape‑and‑reel packaging. Keep sealed after unpacking; bake before mounting for long‑term storage.
Hichips Common‑Anode Buck LED Driver Product Comparison
| Part Number | MOS Implementation | Max Output Capability | Dimming Modes | Package |
|---|---|---|---|---|
| Hi7000D | External MOS, drives up to 50N | 60mA‑5A | PWM+Analog dimming, 65536:1 | SOT23‑6 |
| Hi7001 | Integrated MOS | Up to 1.5A | PWM+Analog dimming, 65536:1 | SOP‑8 |
Hi7000D Comparison Against Competing LED Driver ICs
| Comparison Item | Hi7000D (Hichips, Authorized by GSMicro) | Competitor external‑MOS common‑anode driver |
|---|---|---|
| Control Architecture | Proprietary average‑current control | Mostly peak‑current‑mode control |
| Constant‑current Accuracy | ≤±3% | ±5%~±8% |
| Dimming Resolution | 65536:1 high‑resolution dimming, supports 60ns narrow PWM pulse | Most competitors ≤4096‑step resolution |
| Dimming Methods | PWM + LD analog dimming, soft‑start supported | Some support PWM‑only |
| Loop Compensation | Built‑in loop compensation, fewer BOM parts | Require external RC compensation network |
| Package | SOT23‑6 compact SMD package | SOP8 / ESOP8 |
✅ Hi7000D Key Advantages: Proprietary average‑current algorithm delivers tight current accuracy and low sensitivity to inductor / MOS parameters. 65536‑level high‑resolution dimming achieves smooth stage‑light grayscale performance. Built‑in loop‑compensation reduces external components and BOM cost. External‑MOS architecture allows flexible power scaling from low‑power up to 5A high‑power LED applications. Manufactured by Hichips; GSMicro acts as authorized level‑1 distributor.
Hi7000D Replacement Benefits vs Legacy Parts
Hi7000D can replace traditional peak‑current‑mode external‑MOS common‑anode LED driver ICs for landscape and stage‑light system upgrades.
1、Hi7000D average‑current architecture delivers better batch consistency, constant‑current accuracy ≤±3%
2、Hi7000D supports 65536:1 high‑resolution dimming with ultra‑narrow 60ns PWM pulse input for superior stage‑light visual performance
3、Hi7000D integrates loop‑compensation circuit to eliminate external compensation components and lower BOM cost
4、Hi7000D external‑MOS design enables flexible power scaling for 60mA‑5A high‑power LED projects
5、Hi7000D compact SOT23‑6 SMD package saves PCB real‑estate.
Related Part Recommendations
Hichips common‑anode buck LED driver IC portfolio: Hi7000D, Hi7001. Covering external‑MOS and integrated‑MOS solutions for stage lighting, landscape lighting, automotive‑lighting high‑power LED driver projects. GSMicro Semiconductor is Hichips authorized level‑1 distributor.
Hi7000D Frequently Asked Questions (FAQ)
1. What is the maximum output current of Hi7000D?
Hi7000D works as a controller IC; actual output‑current depends on the external NMOS power MOSFET. Typical achievable range is 60mA‑5A. The GATE pin can drive MOSFET up to 50N rating. Adequate thermal design for external MOSFET is mandatory in real hardware implementation.
2. How do I calculate output‑current for Hi7000D?
Iout=0.2V / RCS; RCS is current‑sense resistor connected between CS pin and GND. Example: for 2A output current, RCS=0.2V÷2A=0.1Ω. Resistor power rating must include sufficient safety margin.
3. How to use LD pin and PWM pin simultaneously?
LD pin for analog dimming; PWM pin for digital PWM dimming. If unused, tie LD and PWM pins to VDD. When using LD pin for PWM input, high‑level signal shall exceed 1.2V. Adding capacitor on LD pin implements power‑on soft‑start function to suppress inrush current.
4. Can Hi7000D support RGBW multi‑channel stage‑light solution?
Yes. One Hi7000D per LED channel to implement RGBW four‑channel dimming solution. Please refer to reference schematic; pay attention to power‑ground layout to avoid cross‑talk between channels.
5. What are key notes for inductor selection?
Inductor saturation‑current rating must be higher than system peak‑current to avoid saturation. Inductor value directly changes practical switching frequency; calculate parameters according to datasheet formulas.
6. How to get Hi7000D engineering samples and datasheets?
GSMicro (Authorized level‑1 distributor for Hichips) provides engineering samples, datasheets and reference design documents. Call sales hotline +86 18018703531; WeChat: gsmicro_semi (remark Hi7000D sample request); email: sales@gs‑micro.com.
About Us
GSMicro Semiconductor (Shenzhen) Co., Ltd. (“GSMicro”) founded in 2023, predecessor LUMENCHIP established in 2010, headquartered in Shenzhen, China. We focus on mixed‑signal analog IC product implementation, committed to delivering green intelligent semiconductor technologies.
GSMicro combines overseas and domestic supply‑chain resources, integrating semiconductor distribution, market analysis, technical solution service and one‑stop component supply. We co‑operate with multiple original chip brands, balancing distribution business and value‑added technical service to serve global customers. Our goal is to deliver innovative, customized products & services, helping clients achieve profitable growth and build future‑ready market solutions.
GSMicro maintains comprehensive product portfolio covering MCU, power‑management IC, signal‑chain IC, power devices, automotive‑electronics and LED‑lighting components. Our authorized partner list includes DONGWOON, PowTech(CR MICRO), CRHJ, APM, COOLSEMI, ANHI, Reasunos, OCX, MassChip, XLSEMI, Hichips, NSIWAY, EGmicro, REIMON, ChipWays, AISPEECH, Aerosemi and more.
Guided by our values “Customer‑Centric, Striver‑Oriented, Value Contribution”, GSMicro focuses on IC technical enablement for distribution business, providing leading application support for semiconductor segments including LED lighting and automotive electronics worldwide.
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