Abstract: Phillips Corporation uses EZ-HV SOI the craft manufacture entire bridge driver UBA2032T/TS to be possible to use in actuating any kind of load, especially suits in actuates the HID lamp. In the article introduced the UBA2032T/TS function characteristic, has given its model application electric circuit.
Key word: Entire bridge driver; High-pressured IC; UBA2032T/TS; HID lamp driving circuit
1 outline
* built-from lifts the diode and the high-pressured level shifter;
* the bridge connection voltage is highest may reach 550V, and may from the IC HV foot input high pressure, think directly the internal circuit produces the low working voltage, but does not need to attach the low pressure power source;
* the belt input start time delay, may use the simple RC filter or come from processor’s control signal to have the detention;
* the oscillator frequency may adjust;
* so long as on the BD foot the voltage will surpass the bridge connection 煟 to guarantee 29V 牐 all MOSFET until the threshold to shut off;
* to guarantee 50% stacking factors, the oscillator signal before presenting outputs the driver should pass the divider;
* non-overlap 煟 wisdom zheng wisdom overlap 犑 rushes to Qi to take the bucket to permit to regard PSI the wall bad electric circuit control, the smallest non-overlap time may be fixed in the interior;
* uses 24 foot SO seal 煟 to wink gathers together grain of Bolivian Egypt Chang Boyu 牶 to stop Bolivia to attach Niu Yingying to hope crab Yu Ai煟 to wink gathers together grain of Bolivian Egypt Chang Boyu cherry 牐 pin arrangement as shown in Figure 1.
Figure 2 UBA2C32T/TS internal structure block diagram
2 internal structures and principle of work
2.1 internal structures and pin function
The UBA2032 internal integration has the voltage manostat, the oscillator, the input signal detention and bridge connection unit electric circuits and so on inhibit circuit, control logic, high/low pressure level shifter, high-end left/right driver and low end left/right driver, shown in Figure 2 is its internal structure diagram. Table 1 arranges in order is the UBA2032 various pins function.
Table 1 UBA2032 pin function
| Mark | Directing Foot |
Merit Can |
|
| UBA2032T | UBA2032TS | ||
| - LVS | 1 | 1 | Logical input negative supply voltage |
| EXTRD | 2 | 2 | Oscillator signal input |
| LVS | 3 | 3 | Logical input positive electricity source voltage |
| n.c | 4,6,16,19,21 | 4,5,7,18,19,22,24,25 | Spatial foot |
| HV | 5 | 6 | The interior low supply voltage produces the pin |
| VDD | 7 | 9 | Interior low supply voltage |
| SU | 8 | 10 | Start time delay input signal |
| DD | 9 | 11 | Divider inhibit control input |
| BD | 10 | 12 | Bridge connection inhibit control input |
| RC | 11 | 13 | Internal neterodyne RC input |
| SGND | 12 | 14 | Signal place |
| GHL | 13 | 15 | Left side of high-end MOSFET electronics grid |
| FSL | 14 | 16 | Left side floating supply voltage |
| SHL | 15 | 17 | Left side of high-end MOSFET source |
| GLL | 17 | 20 | Left side of low end MOSFET electronics grid |
| PGND | 19 | 21 | Power place |
| GLR | 20 | 23 | Right side low end MOSFET electronics grid |
| SHR | 22 | 26 | Right side high-end MOSFET source |
| FSR | 23 | 27 | Right side floating supply voltage |
| GHR | 24 | 28 | Right side high-end MOSFET electronics grid |
Table 2 logical relations
| Component condition | Input (foot) | Output (foot) | ||||||
| BD | SU | DD | EXTDR | GHL | GHR | GLL | GLR | |
| Start | H | X | X | X | L | L | L | L |
| L | X | X | X | L | L | H | H | |
| Vibration | H | X | X | X | L | L | L | L |
| L | L | X | X | L | L | H | H | |
| L | H | H | G | L | H | H | L | |
| L | H | L | L | H | ||||
| L | H | L | L | H | L | L | H | |
| LH | H | L | L | H | ||||
| H | H | L | L | H | ||||
| HL | L | H | H | L | ||||
Note: H is the high level; L is the low level; X expression irrelevant
2.2 principles of work
UBA2032 already may exert the voltage from the HV foot to produce interior low supply voltage VDD 煟 to guarantee 5±2V 牐 may also 煷 raise the low pressure power source direct connection VDD foot the pavilion you to gather together the decayed tooth paper malaria small box region between the heart and the diaphragm to receive foot VDD or SGND 牎 5 guarantees Zheng Mumu to vomit Ying Quzhi clique male Miao Goushen to joke to beat Beta is moves the level 煹 low-lying ellipse to pound straight kite 9V and 12.5V 犑 guarantees the bridge connection output voltage to decide by the EXTDR foot’s on control signal. Table 2 have listed between the IC condition and the input/output logical relation. Once on foot VDD or the HV voltage will drop to power actuation replacement level 煼 straight kite 6.5V and the 10V 犚 rhyme gathers together IC to enter starts the condition once more.
When foot HV voltage traversing release power actuation level, the bridge connection will defer to the following two definite condition commutation:
(1) left side of high-end and right side low end MOSFET breakover, right side high-end and left side of low end MOSFET closure;
(2) left side of high-end and right side low end MOSFET closure, right side high-end and left side of low end MOSFET breakover.
UBA2032 may have the vibration under three kind of different patterns:
The first kind is the internal neterodyne pattern. Under this pattern, the bridge connection inversion frequency decided by non-essential resistance ROSC and electric capacity COSC. In order to realize 50% dutyfactors, the internal divider should through connection foot DD to SGND bestows on can 熗 when foot EXTDR probably with foot LVS, - LVS and SGND or VDD connects in together.
The second kind not after internal divider’s exterior oscillator pattern. Under this pattern, short-circuits foot RC to SGND may cause the internal neterodyne closure. When the exterior supply oscillator connects foot EXTRD, the bridge connection frequency will be equal to the exterior oscillator frequency, but is not likely internal neterodyne pattern such, bridge connection frequency for internal neterodyne frequency 1/2.
The third kind is the internal divider’s exterior oscillator pattern. When this pattern, is causes the internal divider to enable, foot RC, DD and foot SGND must connect in together, but this time entire bridge output frequency for the exterior oscillator frequency 1/2, bridge connection commutation through EXTRD foot signal drop along triggering.
Figure 3 applies the electric circuit basically
3 using electric circuit
3.1 HID lamp basic driving circuit
UBA2032 is mainly to actuate the HID lamp to design, shown in Figure 3 is the HID lamp entire bridge driving circuit which is composed of UBA2032T. In this basic application topology, the IC bridge connection forbids, the start time delay and the external drive function has not been used, IC foot’s - LVS, LVS, EXTDR and BD pipe nipple to SGND. Foot DD connects SGND, the internal 2 frequency division divider is enabled. Because has used the internal neterodyne, the bridge connection commutation frequency may decided by ROSC and the COSC value:
fbridge=1/煟 plays zheng the hydra to disobey Rosc.Cosc
In the formula, constant Kosc is 1.02. When IC on the foot HV voltage surpasses 12.5V (typical value) (, the oscillator starts to work. Once on the foot HV voltage drops to 10V (typical value) below, that UBA2032T will enter the start condition.
Looks like the high-pressured sodium lamp this kind of HID lamp, usually needs 3~6kV the high-pressured pulse to be able to cause its start ignition. Therefore, in entire bridge driver electric circuit, should attach in the ignition 熎 stern 犉 jian pian two T flattery bulge ㄓ light lamp electron ballast, the lamp starts usually using the LC series resonance, in the electric capacity both sides produce a 1kV above high pressure to exert in the tube, makes the tube puncture to light. But the HID lamp starting circuit usually by the belt negative resistance characteristic on-off element (for example the silicon AC double throw switch), parts and so on electric capacity and pressure-rise inductor is composed, this electric circuit may use for to produce several kilovolt high tension ignition pulse.
Figure 4 automobile headlight driving circuit
3.2 automobile headlight driving circuit
Because the HID lamp’s service life is decided in adopts the quartz lamp pipe wall’s sodium transport ratio. Therefore, to make the sodium transport ratio minimum to lengthen lamp’s service life, the HID lamp may in relative depress the operation in the systematic place negative electricity. Shown in Figure 4 is the automobile headlight (the HID lamp) entire bridge driving circuit. In this electric circuit’s UBA2032TS foot LVS and HV and the bridge connection control circuit exerts the same low supply voltage, foot - LVS connects systematically. Take systematically as the reference, this bridge connection may the Chuang nationality sole “H” bridge’s output state and IC on the foot ESTDR control signal is related while - 450V 熥 she bian load 牭 mother dry Miao Gualu. Thus, when the HID lamp ignites, the electric circuit can produce a very big EMC peak pulse, simultaneously in entire bridge MOSFET (LL, LR, HR and HL) on the electronics grid will produce the very high transient voltage or the vibration. When the MOSFET electronics grid outputs (foot GHR, GHL, GHL and GLL) directly with the IC in output driver the conductive coupling, the driver outputs can have the voltage impact. In order to weaken the overtension which the driver outputs, may connect a minimum value is not lower than 100Ω the resistance on each only MOSFET electronics grid, and parallel high-speed switch diode (for example IN4148).
If each MOSFET electronics grid electric charge is only QG, when then the bridge connection frequency is fbridge, 4 MOSFET total grid current IG is 4fbrigeQG. This electric current may (VDD) provide by the internal low pressure power source. Because VDD provides the maximum current is limited by the interior protection circuit in 11mA, therefore, to prevent the electric current insufficient supply, when design should attach an auxiliary low pressure power source. The UBA2032 similar component also has U-BA2030 and UBA2033 and so on.
