- 您现在的位置：买卖IC网 > PDF目录19324 > UBA2024BT/N1,518 (NXP Semiconductors)IC DRIVER HALF BRIDGE 14SO PDF资料下载
参数资料
| 型号： | UBA2024BT/N1,518 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER HALF BRIDGE 14SO |
| 标准包装： | 2,500 |
| 类型： | CFL/TL 驱动器 |
| 频率： | 40.05kHz ~ 42.68kHz |
| 电流 - 电源： | 5mA |
| 电源电压： | 11.4 V ~ 13.3 V |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SO |
| 包装： | 带卷 (TR) |
NXP Semiconductors
UBA2024
Half-bridge power IC for CFL lamps
7. Functional description
7.1 Supply voltage
The UBA2024 does not require an external low-voltage supply as the mains supply
voltage applied to pin HV powers it. The IC derives its own low supply voltage from this for
its internal circuitry.
7.2 Start-up state
With an increase of the supply voltage on pin HV, the IC enters the start-up state. In the
start-up state the high-side power transistor is not conducting and the low-side power
transistor is switched on. The internal circuit is reset and the capacitors on the bootstrap
pin FS and low-voltage supply pin V DD are charged. Pins RC and SW are switched to
ground. The start-up state is defined until V DD = V DD(startup) .
7.3 Sweep mode
The IC enters the sweep mode when the voltage on pin V DD > V DD(startup) . The capacitor
on pin SW is charged by I SW and the half-bridge circuit starts oscillating. The circuit enters
the start-up state again when the voltage on pin V DD < V DD(stop) .
The sweep time (t sweep ) is determined by the charge current (I ch(sw) ) and the external
capacitor (C SW ). Typical the total sweep time set by C SW is:
t sweep = C SW ( nF ) × 10.3 ms
(1)
During the sweep time the current flowing through the lamp electrodes performs some
7.4 Reset
A DC reset circuit is incorporated in the high-side driver. The high-side transistor is
switched off when the voltage on pin FS is below the high-side lockout voltage V float(UVLO) .
7.5 Oscillation
The oscillation is based upon the 555-timer function. A self oscillating circuit is made with
the external resistor R OSC and the capacitor C OSC (see Figure 4 ).
To realize an accurate 50 % duty cycle, an internal divider is used. This reduces the bridge
frequency to half the oscillator frequency.
The output voltage of the bridge will change at the falling edge of the signal on pin RC.
The design equation for the half-bridge frequency is:
f osc = -----------------------------------------
1
k × R OSC × C OSC
An overview of the oscillator signal, internal LS and HS drive signals and the output is
(2)
UBA2024
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6.2 — 1 November 2010
? NXP B.V. 2010. All rights reserved.
4 of 17
相关PDF资料 |
PDF描述 |
|---|---|
| VJ1206A220JBGAT4X | CAP CER 22PF 1KV 5% NP0 1206 |
| HMC36DREN-S734 | CONN EDGECARD 72POS .100 EYELET |
| MCP9803T-M/SNG | IC SENSOR THERMAL 2.7V 8SOIC |
| TACR226K003X | CAP TANT 22UF 3V 10% 0805 |
| GSC44DRAN-S734 | CONN EDGECARD 88POS .100 R/A SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| UBA2024DB/BP/120VDIP,598 | 制造商:NXP Semiconductors 功能描述:OPTIMIZED FOR 25W BURNER. PF >0.58. 600MS PRE-HEAT. - Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:120V 25W demo brd |
| UBA2024DB/BT/120VSO,598 | 制造商:NXP Semiconductors 功能描述:OPTIMIZED FOR 25W BURNER. PF >0.58. 600MS PRE-HEAT - Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:UBA2024 SO14 120V 25W demo board |
| UBA2024P | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Half-bridge power IC for CFL lamps |
| UBA2024P/DB/120VDIP,598 | 制造商:NXP Semiconductors 功能描述:- Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:UBA2024P 13W 120V round demo board |
| UBA2024P/DB/230VDIP,598 | 制造商:NXP Semiconductors 功能描述:- Boxed Product (Development Kits) 制造商:NXP Semiconductors 功能描述:UBA2024P 13W 230V round demo board |
发布紧急采购，3分钟左右您将得到回复。