BL6332 http://www.belling.com.cn - 1 - total 6 pages 3w anti-clip class-d audio power amplifier features output power - 3.0w (v dd =5.0v, r l =4 , thd+n=10%) - 1.8w (v dd =5.0v, r l =8 , thd+n=10%) low thd+n and low noise high s/n ratio to 95db low emi improved psrr (?80db) and wide supply voltage (2.5 v to 5.0v) eliminates need for a voltage regulator over-current and thermal protection function pop noise reduction function available in space-saving package: 9-bump wlcsp applications mobile phone, pda mp3/4, pmp, gps portable electronic devices pin diagrams general description BL6332 is a 3-w (v dd =5.0v, r l =4 ? ) high efficiency filter-free class-d audio power amplifier in a wafe r chip scale package (wlcsp) . BL6332 has a professional anti-clip output control circuit which reducing distortion of output signal due to either the over level input signal or power supp ly voltage down with battery. features like high efficiency, ?80db psrr, over- current protection and thermal protection function make the BL6332 ideal for cellular handsets. typical application circuit pin description pin # name description a1 in+ positive differential input a2 agnd analog gnd a3 out- negative output terminal b1 avdd analog power supply b2 pvdd power supply b3 pgnd power ground c1 in- negative input terminal c2 ctrl mode select c3 out+ positive output terminal
BL6332 http://www.belling.com.cn - 2 - total 6 pages order information part number package shipping BL6332 9-bump wlcsp 3000 pcs / tape & reel function block diagram absolute maximum ratings (over operating free-air temperature, unless otherw ise noted) v dd supply voltage -0.3v to 5.5v v i input voltage -0.3v to v dd +0.3v t a operation free-air temperate range -40c to 120c t j operation free-air junction temperature -40c to 1 50c t stg storage temperature range -65c to 150c t sld soldering temperature 300c, 5sec recommended operating conditions symbol parameter conditions min typ max unit v dd power supply voltage 2.5 5.0 v t a operating ambient temperature -20 85 c r l speaker impedance 4 dc characteristics (v dd =2.5v to 5 v, ta =25c, unless otherwise noted.) symbol parameter test conditions min typ max unit v uvlh power supply start-up threshold voltage 2.5 v v uvll power supply shut-down threshold voltage 1.8 v v mod1 anti-clip1 mode setting threshold voltage 1.3 v dd v v mod2 anti-clip2 mode setting threshold voltage 0.85 1.15 v v mod3 anti-clip off mode setting threshold voltage 0.5 0.72 v v mod4 power-down mode setting threshold voltage v ss 0.14 v i dd consumption current vdd=3.6v, no load, no signal input 5 ma i pd consumption current in power-down mode ctrl<0.2v 1 a
BL6332 http://www.belling.com.cn - 3 - total 6 pages ac characteristics (v dd =2.5v to 5v, ta =25c, unless otherwise noted.) analog characteristics (v dd =3.6v, av=17.5db,ta =25c, c in =100nf, anti-clip off, unless otherwise noted.) symbol parameter test conditions min typ max unit r l =4 ,vdd=5v 3 w p o maximum output r l =8 ,vdd=5v f=1khz, thd+n= 10% 1.8 w r l =4 , p o =0.5w, f=1khz 0.09 % thd+n total harmonic distortion rate r l =8 , p o =0.5w, f=1khz 0.09 % n residual noise av=17.5db a-weighted 60 v rms snr signal/noise ratio av=17.5db a-weighted 95 db psrr power supply rejection ratio 217hz -80 db r l =8 , p o =0. 6w, 85 % maximum efficiency r l =8 , p o =0. 1w, 80 % vo output offset voltage 10 mv f res frequency characteristics c in =0.1 f, f=100hz to 20khz -3 1 db gv closed loop gain vdd=5v anti-clip off 17.5 db application information anti-clip control function this is the function to control the output in order to obtain a maximum output level without distortio n when an excess input which causes clipping at the differential sig nal output is applied. that is, with the anti-clip f unction, BL6332 lowers the gain of the amplifier to an appropriate value so as not to cause the clipping at the differ ential signal output. and, BL6332 follows also to the clip of the output wa ve form due to the decrease in the power-supply vol tage. the attack time and the release time of anti-clip con trol are fixation two levels, and selects with the ctrl terminal. the attack time is a time interval until from gain f alls to target attenuation gain -3db with a big sign al input enough. and the release time is a time from target attenuati on gain to not working of anti-clip. attack time and release time anti-clip mode attack time release time 1(recommendation) 45ms 3.1s 2 10ms 1.8s over-current protection function this is the function to establish the over-current protection mode when detecting a short circuit betw een BL6332 differential output terminal and vss, vdd, or another d ifferential output. in the over current protection mode, the symbol parameter test conditions min typ max unit t stup start-up time vdd=5v 30 ms f c input cut-off frequency c in -33nf,av=17.5db 120 hz t at1 attack time 1 v dd =5v,g=10db 45 ms t rl1 release time 1 v dd =5v,g=10db 3.1 s t at2 attack time 2 v dd =5v,g=10db 10 ms t rl2 release time 2 v dd =5v,g=10db 1.8 s t mod each mode setting time(except power down) 0.1 ms
BL6332 http://www.belling.com.cn - 4 - total 6 pages differential output terminal becomes a high impedan ce state. once the short is removed, the device wil l be reactivated.. thermal protection function thermal protection on the BL6332 prevents damage to the device when the internal die temperature exceed s 150 . there is a 20 tolerance on this trip point from device to device . once the die temperature exceeds the thermal set point, the outputs are disabled. this is not a latc hed fault. the thermal fault is cleared once the te mperature of the die is reduced by 20 . the device begins normal operation at this point with no external system intervention. under voltage lock-out (uvlo) the BL6332 incorporates circuitry designed to detect low supply voltage. when the supply voltage drops to 1.8v or below, the BL6332 outputs are disabled, and the devi ce comes out of this state and starts to normal fun ction when v dd R 2.5v. power down and initialization function when ctrl terminal is connected to the gnd potentia l, the ic goes to the power-down mode. in the mode, all the circuit functions stop and its current consumption becomes the lowest. when ctrl terminal is set to h level, the power-dow n mode is canceled and the ic starts up after start up time (t stup ). in order to return from the power-down mode a desir ed mode needs to be set after setting both ctrl1 an d ctrl2 to h level during t wk . in addition, at startup, cancel the power-down mo de after supply voltages has been sufficiently stabilized. ctrl terminal function by connection external resistors (rctrl1, rctrl2, an d rctrl3: accuracy of 1%) to ctrl terminal, and impr ession setting threshold voltage of each mode to ctrl term inal, the followings can be set: anti-clip1, anti-cli p2, anti-clip off, and power-down mode. when turning on the suppl y voltage or cancelling the power-down mode, contro l the ctrl terminal according to the procedure for cancel ling power-down. connect the terminal to the ground through a capaci tor cctrl (a ceramic capacitor of 0.1 f or more)
BL6332 http://www.belling.com.cn - 5 - total 6 pages micro computer cctrl 0.1uf rctrl3 rctrl2 rctrl1 ctrl1 ctrl2 1.8v~5.0v ctrl h level indicates a microcomputers i/o port h le vel output voltage that is input to ctrl1 and ctrl2 terminals and gnd indicates gnd of the microcomputer. gnd level of the microcomputer must be the same as that of BL6332. the control of ctrl terminal is based on i/o port h level output voltage of microcomputer that is conn ected. set resistance constants according the i/o port h le vel output voltage of each microcomputer as shown b elow. i/o port h level output voltage of microcomputer 1.8v 2.6v 3.0v 3.3v 5.0v rctrl1 27k 33k 33k 33k 56k rctrl2 43k 51k 51k 51k 82k rctrl3 82k 27k 22k 18k 15k functions of ctrl pin are designed with their contr ol by two control pins (ctrl1 and ctrl2) only a switching control between anti-clip1 mode and power-down is available when a single control termin al used. a setting voltage should be set according to vmod1 an d vmod4, and use a rc filter with time constant of 1 msec or more in order to eliminate noise at transmission si de such as micon etc. (example. rctrl1=10k and cctrl=0.1 f). pop and click circuitry the BL6332 contains circuitry to minimize click and pops. for the best power-off pop performance, the a mplifier should be set in shutdown mode prior to removing th e power supply voltage. ctrl1 ctrl2 function h h anti-clip 1 mode h gnd anti-clip 2 mode gnd h anti-clip off mode gnd gnd power-down mode ctrl1 function h anti-clip 1 mode gnd power-down mode
BL6332 http://www.belling.com.cn - 6 - total 6 pages package information unit: millimeter p0.50typ 1.00 0.29 0.25 0.620 max
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